Gate lock: how to choose a reliable and easy-to-use mechanism

For a private home, a fence is not only part of the decor of the site, but also protection from prying eyes and intruders. Therefore, it is important to buy and install a reliable lock on the gate. This will become a difficult obstacle in the path of ill-wishers.

When purchasing, you need to consider what fence material and what lock mechanism will make it more comfortable for owners to open and close the door. It is also worth considering who the manufacturer is and not looking for cheaper options.

Classification of gate locks

Regardless of their purpose, door locks differ in the installation method, operating principle and type of locking mechanism.

By mounting method

Products are divided into several types. Let's look at the nuances of how each of them works.

Mortise

More often used as a street lock on a fence, garage door, or home. Selected to match the thickness of the door leaf. It crashes into a door made of wood or sheet metal. Suitable for gates made of corrugated sheets. In the latter case, it is important to take into account the design of the door leaf. If the frame is welded from a profile, then its diameter should allow the required lock model to be inserted without any problems.

The most popular mechanism model is the butterfly. The locking elements of mortise locks are metal rods that can be opened with a key from either side.

The butterfly lock is moisture and dust resistant, lasts a long time, withstands temperature changes well, and reliably protects against burglary.

Most mortise models have a latch on the back, which makes closing/opening the fence door easier.

The mortise mechanism is an internal lock that is mounted inside the gate leaf, so it is waterproof.

The downside of the lock is that it is labor-intensive to install, which involves cutting an opening in the door leaf into which the frame will then be inserted. The main mechanism is attached to the fixed box.

Overhead

You can install such a lock on a gate with any leaf thickness, but the installation will be slightly different.

Photo. For a long service life, it is advisable to protect the rim lock from precipitation.

To fasten a thick metal gate or a gate with the addition of forged elements on top, you need to drill holes to fix the padlock with screws, and make small holes in the frame itself for the bolts.

To install the overlay mechanism on top of a thin sheet, you will need to first prepare a site to reinforce the lock. It is important to avoid mistakes when marking and carefully drill holes for screws. This will prevent holes from forming on the front side.

If the frame of the gate is wooden, you will have to attach a metal plate for reinforcement and make a hole in it for the retractable mechanism.

The advantage of a rim lock is that the door leaf remains undamaged and there is no need to cut any openings in it for fastening.

The downside is that the external locking mechanism becomes vulnerable to environmental influences (precipitation, moisture, temperature changes), and there may be malfunctions in its operation. To avoid this, it is better to attach a small steel or plastic plate above the lock, which will cover it from rain and other precipitation.

Mounted

A padlock on a garage door, entrance door to a house, cellar, summer kitchen, barn is still used by owners of summer cottages in villages and small towns. Its mechanism is simple. The kit can come with several identical spare keys at once. The sizes are selected depending on the purpose.

To attach a padlock, you do not need to have any special construction skills. Its main task is to ensure that the door closes securely and maintains it in this position.

To install such a lock, you need to prepare the lugs in advance and secure them by welding. They are made flat for wooden gates or angular for sheets made of Euro picket fences, corrugated sheets, or sheet steel.

The diameter of the eyelet (ring) should be slightly larger than the lock shackle.

Mounted products are no longer as popular as they used to be. The reason for this is the significant disadvantages of the mechanism:

• closing/opening is possible only from one side (street or yard);
• low reliability;
• in cold weather it may be difficult to open;
• it is easy to tear, cut or crack.

Hanging the lock is simple - the arms are threaded through the eyes and closed. They open it by turning the key.

According to the principle of operation of the locking mechanism

There are several types. Let's look at the nuances of the device and operation of each of them in more detail.

Suvaldny

A popular way to lock a gate or garage door is to use a lever lock. It has this name because of the levers - metal plates, part of the lock's secret.

The product consists of the following elements:

1. Frame. A metal box that is covered with a galvanized or hardened steel lid. There are secret elements inside. Products without lids are available for sale. It is worth considering that a lock with a cover made of hardened steel is considered burglar-resistant, so its price is higher.
2. Bolt. Responsible for closing/blocking the gate. The bolt can be metal plates, rectangular or cylindrical pins. When opening/closing the lock, only part of them is visible - the crossbars. The more bolts there are in the mechanism, the more reliable the lock. The hidden part of the bolt is the shank. The metal plate is firmly connected to the crossbar.

The shank contains several key parts:

1. The comb is toothed. An element through which the user acts on the deadbolt by turning the key.
2. Shank stand. When pressing on the lock bolts in the closed position, the stand will not allow them to be pushed inward. Acts as part of the bolt locking process.
3. Levers. Secret detail of the castle. They come in different shapes, sizes, materials. By turning the key, the levers come into position and form a gap. The bolt is unlocked and the lock opens. The levers have springs that return them to their original position. You need to select levers made of high-quality steel.

The place where the levers come into contact with the key is called the working edge. The area near the plate where the key turns is the key window.

There are lever locks with an open and closed key window on sale. Depending on the product model, the shape and structure of the working edge may differ.

Rack (crossbar)

It is considered a garden-type castle. Used as a locking mechanism in garages and fence gates.

The rack lock consists of the following elements:

1. Reiki. A rectangular metal rod with several grooves cut on top. Depending on the model, the number, depth and width of the crossbars may vary. Standard locks have 2-3 slats, but there are products with one large rectangular slatted bar.
2. Springs. When the lock is closed, it pushes out the bar.
3. Key. Flat long rod with thread. Section - rectangular, round. It is quite difficult to make such a key, so creating a duplicate is difficult and expensive.

Key cutting happens:

• one-sided;
• double-sided

The rack and pinion lock has a tricky feature - there is no hidden mechanism.

The bolt begins to work due to the spring. To open/close the door, the key is simply pushed into the opening until it stops. The grooves on the key and the crossbar are combined in a certain sequence. As soon as they are connected to each other, turning the key compresses the spring, the bolt goes inside the case and the lock opens.

Cylinder

The secret of the lock is hidden in a cylindrical body or, as it is also called, a larva. Material: brass.

According to European standards (DIN), manufacturers must adhere to the same dimensions when producing cylinders. This is a huge plus because locks from different companies can be interchanged while maintaining the required performance characteristics.

Cylindrical products can have two devices:

• pin;
• disk

The basis of the pin structure is a removable core. Other design elements:

1. Frame. Made of metal. All elements of the lock product are located inside the housing.
2. Cylinder. This is where the main mechanism is located.
3. Code pins. Another name is pins. Details of the locking device.
4. Locking pins. Responsible for locking the cylinder and code pins.
5. Return spring. Responsible for blocking code, locking pins.
6. Leash. The part that moves the bolt.

The pin cylinder lock is unlocked with a key.

For outdoor use, you need to choose this type.

The disc cylinder mechanism consists of a set of discs. Each disc has a unique cutout. The keys to the lock also have cutouts - they are identical to those on the disks. The keys are semicircular in shape. As soon as the key is turned, pressure is applied to the discs and they move deeper into the lock. The bolt moves and the lock opens.

Craftsmen strongly do not recommend using disc locks for fences in outdoor conditions. As practice has shown, the disk mechanism often freezes in the cold.

Code

Modern view of the castle. It is used on entrance doors of multi-storey buildings, fence gates, garage doors. Such a mechanism cannot be opened or hacked.

They are placed on gates made of solid fabric; for fastening on forged fabric with gaps, you need to prepare a platform first.

A combination lock works by entering a combination of numbers. If the code is entered correctly, the rings and pins take a certain position and activate the lock tongue - the opening is performed.

The advantage of the lock is that you don’t have to carry the keys with you or be afraid of breaking or losing them. It is enough to tell the code to all residents of the house. If necessary, the code can be changed to a new combination an unlimited number of times.

According to the method of constipation, combination locks are:

• mechanical;
• electromechanical;
• electrical;
• digital.

If desired, a standard mechanical lock with a code can always be replaced with the same one, only equipped with an electric drive.

Electric

Happens:

• electromagnetic;
• electromechanical.

The operating principle of a magnetic lock is based on the action of magnets when connected to electricity. The mechanism ensures reliable closing of the door. It cannot be easily opened, even if you apply enough force to the handles.

The downside is that it stops working during power outages, so it’s worth providing a backup battery.

An electromechanical lock is considered a universal device. When a signal is received, the locks are activated and the lock opens/closes. If the power supply is interrupted, the lock continues to function manually - it opens with a regular key.

It is often placed on swing, sectional, or sliding gates for vehicle entry. Can also be installed on a gate. For convenience, it is equipped with automation. Often mounted together with CCTV cameras, intercom, scanner.

The disadvantage of electric locks is that they do not withstand cold and sudden temperature changes, so you need to insulate the wires from moisture.

Radio wave

The main advantage of radio wave locks is the tightness of the case, so there is no need to worry about the harmful effects of the environment on the functioning of the mechanism.

They are often used for gates, fences of country cottages, recreation complexes, private boarding houses, where emphasis needs to be placed on controlling the flow of people and preventing strangers from entering the territory.

A radio wave lock can be:

• mortise;
• invoice.

The choice must be made based on the door material.

The wireless mechanism works simply. The key element is a sensor that responds to a radio signal, locks or opens the door. To improve operating efficiency, it is combined with an intercom and a video surveillance camera. A special keychain is used to open it. The operation of the mechanism can be controlled remotely.

The latest new products have a built-in battery, so power outages do not affect the operation of the system.

Electronic

An innovation among locking mechanisms is electronic devices. They are considered the safest. The key and code for them cannot be found or faked. They open by scanning a special magnetic card; there may be a retinal or fingerprint scanner.

Rarely used for private purposes, since the mechanism itself and installation are very expensive.

Installed in facilities with limited access: offices, companies, factories.

Device

An electromechanical lock is a remotely controlled mechanism for opening or closing doors.

It doesn’t matter whether the entrance is to an apartment or an office. The mechanism is also perfect to use for a gate or garage.

The structure of the device, opening/closing are similar to a conventional mechanical device. There is a crossbar and springs.

The main difference is the valve, which operates using:

• solenoid (gate control occurs due to electromagnetic fields);
• electric motor;
• electric latch;
• electrical blocking.

The listed types of mechanism locking can be combined with unlocking methods.

The type of mechanism determines how it opens:

• remotely (using a key fob, remote control);
• electronic key;
• a regular key;
• by entering the code.

How do electromechanical locks work?

Their principle of operation is simple - electricity is supplied to the block, the signal removes the blocking of the latch, pushing back the constipation.

Automation is blocked after 10-15 seconds. You can leave the room from the inside by pressing a button or applying a key or chip.

Please note that the code door opens when the receiver and carrier code combinations match. New, expensive locking devices work even when using the fingerprint of the owner of the premises.

Choosing a lock depending on the gate material

When choosing a lock, the following factors are important:

1. Door leaf thickness. It is taken into account both when choosing a mortise and overhead mechanism. Massive heavy locks can be mounted on a reliable gate made of thick wood, solid steel sheets, or forged sheets.
2. Level of periodic, constant load. For a walk-through place, a large family, where the door will often open and close, it is necessary to choose an appropriate model that will be resistant to such loads.
3. Product safety level. There are four levels in total. Locks with the first level are the easiest to pick, while the fourth level is the most burglar-resistant.

A lock is attached to an iron sheet, corrugated sheet, or steel with patterns that need to be forged by welding. This will be a reliable fixation, without the risk that the mechanism will begin to loosen. Clear calculations are important here; errors during welding are unacceptable.

The lock can be attached to a wooden gate made of picket fences, boards, slats, or solid wood with self-tapping screws (invoice) or, according to the markings or drawing, cut an opening and insert the mechanism inside the door (mortise).

It is much easier to secure an overhead lock for gates made of any material, while the door remains undamaged. The main thing is that the mechanism rods fit freely and effortlessly into the grooves.

If you decide to attach a lock with a handle, then it is better to draw up a diagram where the location of the handle and the lock will be clearly visible. They shouldn't be near each other. The handle will require separate fasteners. The handle should not be an obstacle to turning the key or opening the lock.

For electric locks, the cable connection is made at the end. It is better to run the wires underground and carefully insulate them. On the gate, it is better to hide the cable in the cavity of a metal profile or plastic lining - this will provide good protection from moisture.

It is better to cover overhead locks with a rubber or plastic lining.

What is BUZ and why is it needed?

If you connect an electric lock on the gate according to the diagram above, it will work, but the calling panel will function intermittently. When power is supplied to open the lock, the voltage to the calling panel disappears completely or drops significantly. There is noise or sound/image disappears. To prevent this from happening, use a separate power supply for the lock or install a BUZ. Full name - lock control unit . The option with a second power source is not bad if you have somewhere to get 220 V. If this is not possible, install a BUZ.

What does the BUZ (lock control unit) look like?

BUS is a small device that stores energy. There is also a diode isolation, which eliminates the voltage drop supplied to the calling panel and intercom. So the presence of a BUZ in the scheme stabilizes the operation of the entire system.

Connection diagrams with BUZ

There are two working schemes for connecting an electromechanical lock with a control unit. In the first, it receives power from the call panel, in the second, from the intercom.

Diagram of serial connection of BUZ with electric lock

In the first scheme, power is supplied to the gate lock through the call panel. The opening button is on the intercom, and the panel only broadcasts the command. What's wrong with this option? Because the lock will not work if the panel or control unit is damaged. That is, the reliability of the system is low. The advantage of this scheme is less cable consumption, but this is not the case when you should save on cable.

We supply power to the BUZ from the intercom

If you supply power to the BUZ from the intercom, you will have to pull two cables to the gate: to the block and to the panel. But this option is more reliable, because it will be possible to open the gate even if the call panel does not work. But you will need twice as much cable.

Which locking mechanism is suitable for installation on a gate or wicket?

The following types of locks are installed on garage and fence doors:

• latch;
• latch;
• bolt;
• vertical stop;
• locking systems with levers and swivel posts.

Requirements for locking mechanisms:

• burglary resistance;
• they must withstand heavy loads, including mechanical ones;
• The bolt should fit into the latch tightly, without gaps.

To firmly fix the leaves to the gate frame, levers, latches, and pressing locks are most often used. Fixed to the lower part (threshold) and the upper beam. The gate will not move in strong winds, and what is happening outside the gate will not be visible.

For swing gates and gate leaves, a vertical latch would be a good option. It is a metal rod with a handle that is inserted into a hole in the ground. Firmly fixes the blade in the closed position.

A vertical latch is also used on mortise sashes, but of a smaller size. At the top and bottom of the opening, metal pieces of pipes are welded into which the bolt rods will go.

To fix small wooden or metal gates under vertical locks, a hole is made in the ground, a piece of pipe is inserted, and fixed around it with cement mortar. Double-sided latches can be installed.

Horizontal overhead valves are popular. They are suitable for any type of gates and doors. The latch is made of a metal rod or plate. There is a locking ear holder. The operating principle is similar to the vertical latch.

On sale there is a lock NOEZ ZK-230-S specifically for street gates.

Advantages, disadvantages

After checking the performance of the equipment and changing the conditions of use, you notice its positive aspects, but also its disadvantages.

Equipment of this type has undeniable advantages:

1. Very convenient (especially attractive when used in the private sector) due to the remote control. Now it is possible to let guests and visitors in while staying in the house.
2. It has a normal appearance, which allows it not to attract prying eyes. The location does not matter: the front door or the gate of the fence of a private house.
3. It has two types of opening: electrical, mechanical.
4. High level of security.
5. Suitable for PVC products.

Obvious disadvantages include:

1. No budget. The cost is high, which means that only a financially secure person can afford such a purchase.
2. Difficult to install yourself.

Popular manufacturers of gate locks

Below are manufacturing companies that have won the trust of consumers with product quality and affordable prices.

Apecs

Apex is a Russian company whose brand sells locks and door fittings. The trademark was created in 1992. Translated from Latin it means “peak”.

Products of economy and medium classes are produced.

The entire range consists of 10 product groups, which include more than 2000 names. In 2000, an office was opened in Beijing. The company has representative offices in the UK, Ukraine, Slovenia, and Russia.

Among the manufactured products, it is worth noting the following types of locks:

• mortise lever, cylinder;
• mounted;
• for interior doors;
• secrets for locking mechanisms.

Among the door fittings:

• pens;
• knobs;
• closers;
• valves;
• latches;
• bolts;
• loops of different types;
• armor plates;
• door peepholes.

The company's products are available for free sale in 13 countries around the world. All products are certified in accordance with current GOSTs.

Abloy Oy

Abloy Oy is a Finnish company, one of the leaders among manufacturers of locks and accessories for them. Created back in 1907 by Emil Henriksen.

The distinctive sign due to which Abloy Oy has become recognizable everywhere is the logo with the image of a cylinder lock cylinder.

The company still produces disc cylinder mechanisms in the Abloy Classic line.

There are also more modern hacker-resistant systems on sale such as Abloy Sentry, Novel, which are protected by patents.

The company is also engaged in the development of electromechanical locking mechanisms such as the Abloy CLIQ series. You can control access and control the operation of doors remotely from a mobile phone connected to the Internet. If there is no network, the mechanism will continue to function in manual mode.

A special feature of Finnish cylinder locks Abloy Modular is the ability to adjust the length of the cylinder, making it longer or shorter.

The larvae have a high degree of secrecy, the number of Abloy combinations is about 20,000,000 combinations.

The only disadvantage of the product, which makes you wonder whether to buy it or not, is the high price.

ABUS

German manufacturing company. It was founded by August Bremiker and his sons, hence the abbreviation for the name.

The company was the first manufacturer in the world to introduce the U-shaped padlock to the market.

The company specializes in the production of:

• padlocks;
• cylinders;
• motor locks;
• lock fittings.

The produced cylinders are equipped with a large number of pins, which are arranged in three planes. This significantly increases the product's resistance to burglary.

The products belong to the second and third class of burglary resistance, so they complement the middle class doors well.

CISA

The name of this Italian company is an abbreviation for Costruzioni Italiane Serrature Affini. Start of activity - 1926. In the same year the first lock was produced.

Over the years of successful work, the company has gained a worldwide name. And modern product models are reliably protected from unauthorized intervention.

For example, in the CISA Revolution PRO model, if you try to remove the cylinder, the bolts are automatically locked and the door remains closed. In the CISA New Cambio Facile model, you can recode the mechanism to other keys without removing the lock.

But in recent years, buyers have noted problems with the quality of middle-class models that are mass-produced in China. Therefore, if you need a budget reliable lock, then it is better to pay attention to other manufacturers.

Kale Kilit

The manufacturer from Turkey is represented on the Russian market with a number of products with a low price, simple design and average resistance to burglary.

The company's range of locking mechanisms includes:

• tick-type locks;
• with deadbolts and swivel head;
• cylinders that are subject to recoding;
• locks for internal and interior doors.

Buyers are attracted by the price, which is several times lower than that of competitors from Europe. The quality is at an average level.

Evva

The Austrian manufacturer of locking systems began its activities back in 1919. Today it is a whole concern with factories in Germany and the Czech Republic.

The basis of Evva's specialization is the production of cylinder mechanisms and software for locking systems.

The product from the Austrian company cannot be hacked without breaking the code block.

The downside is the high price of the product.

MUL-T-LOCK

The Israeli manufacturer began its activities back in 1973. Today, the company has production facilities and official representative offices in many countries.

The warranty period for MUL-T-LOCK products is 10 years. The moving elements are made of cupronickel. The product line includes locks with a high level of security.

Plus - affordable price.

No significant disadvantages were found.

Additional devices

For normal installation, additional devices must be installed on the equipment.

Among them:

1. Controller - helps control a device of this operating principle (plastic, aluminum).
2. Power supply that works without interruption. Electrical power is required for the device to function. You can open the entrance not only with a key. Another method is a metal entrance key fob, a secret code. Such a source must be equipped with an internal battery. This is an eternal battery that will work if there is a power outage.
3. Code reader - installed outside to open with a chip (card) or key fob.
4. Buttons for opening without a key.
5. An intercom is a universal element for opening a house from the inside. Equipped with audio and video communication. It is made of plastic and may have a glass screen.

Attention: additional equipment depends on the wishes of the buyer.

Five best good quality locks

Let us examine in detail the technical characteristics and features of high-quality locking mechanisms of various types.

Electromechanical rim lock "Atis"

Excellent for installation on street gates, entrance doors of apartment buildings, and fence gates of various types.

The case is made of stainless steel, so the mechanism is resistant to moisture. Has a cylinder secretion. Universal from the opening side position. There is an automatic locking function. The set includes 5 keys. Recommended for use with a maximum door weight of 1.5 kg. The charging spring is adjustable. Operating voltage from 9 to 12 V. Dimensions 137*105*37 mm. Made in China. The average price is 1950 rubles.

Mortise lever "Guardian"

The product belongs to the third security class, so the Guardian mortise mechanism is reliably protected from hacking such as rolling or decoding.

Scope of application: entrance doors to private houses, gates, offices, warehouses or garages, safes. The mechanism is resistant to dust and moisture. Can be installed on both wooden and metal doors. The main part of the castle is hidden inside the canvas.

The length of the crossbar is 30 mm. The set includes 4 keys.

The recommended door leaf thickness for installation is from 35 to 80 mm. When fastening, you should focus on the diagram specified in the manufacturer’s instructions.

This mortise model has protection against drilling, a self-impression pick. There are 2 holes for fastening door handles. Fastening is best done with tightening screws. Supplied with armor plate. Warranty period - 12 months. The average price is 2000 rubles.

Electromechanical lock Cisa 1.14020.18

It is considered one of the thinnest mortise models. The main part of the mechanism is a reliable metal alloy. The crossbar is dismountable. Ideal for installation on metal doors, gates made of corrugated sheets, or European picket fences. Comes with three keys. Opens manually with a key or remote control when electricity is available. Average price - 6300 rubles.

Cylinder lock Simeko ZK-40

Excellent for working in outdoor conditions. Can be attached to any side of the gate (left or right). The mechanism is made of galvanized steel, the body is made of high-strength ABC plastic. Comes with a latch. It is equipped with a locking plate, which can be mounted to a profile with a thickness of 40 mm or more. The weight of the lock is 1.1 kg.

General dimensions - 130*145*170 mm. Average price - 2670 rubles.

Electromagnetic lock with combination keypad from ATIS

Made in China. The type of key used is a magnetic card. The set includes 5 pieces. The warranty period is 12 months.

In addition to the keys, it comes with:

• power supply;
• code keyboard;
• exit button.

The average price of a kit without installation services is about 9,100 rubles.

When choosing a lock, it is important to take into account ease of use, resistance to burglary, the quality of the mechanism itself, and its cost. When purchasing electric models, you need to provide a built-in or spare battery in case of power outages.

Connecting electromagnetic models

As we said above, the good thing about electromagnetic locks is that they are compatible with electronic devices. They can be opened with electronic keys (cards). To implement all the capabilities (reading key cards, for example), you need a remote access controller - ACS.

Connecting an electronic lock via a controller

These controllers come in a variety of variants, with different capabilities. To connect a home automatic lock, you will need the simplest one. The connection diagram will be simple: connect all devices to the corresponding inputs/outputs of the controller. You just need to choose the right wires, thoroughly strip the ends of insulation and secure them in the appropriate sockets of the ACS.

As you can see in the diagram above, only the intercom monitor in the house is connected through the calling panel. But this is due to the peculiarity of the intercom. If only the handset is used (without a monitor), the circuit will be similar. Just between the handset and the calling panel it is enough to throw a two-core cable (KSVP 2 * 0.5).

Features of operation

When installing gate control systems, mortise-type electric locks are used extremely rarely. This is mainly due to the complexity of their installation and the large labor costs during the work. An element of security systems such as a video intercom is usually installed by specialists. To ensure high security, the gate must be equipped not only with a video intercom, but also with an electromechanical lock. These two elements form the basis of the security system of any private territory.

In order for the installed equipment to last for a long time, it is necessary to periodically inspect it and carry out maintenance.

Due to the fact that the electromechanical lock attached to the gate is constantly exposed to atmospheric precipitation, it is necessary to constantly check its performance and, if necessary, carry out repairs.

To protect the lock from precipitation, many owners install a metal visor or use a casing. By using it, you can significantly extend the service life of an electromechanical lock without the need for frequent inspection.

Voting by our readers

Which castle would you choose or recommend?

CISA 17.685

13.64 % ( 3 )

ABLOY EL648

4.55 % ( 1 )

Dahua DHI-ASL8112K-B

18.18 % ( 4 )

PERco LB85.1/LB85.2

9.09 % ( 2 )

J2000-LOCK-EM01SS

9.09 % ( 2 )

SELOCK SKUD

0.00 % ( 0 )

Iseo 781802252

13.64 % ( 3 )

CISA 11.931

9.09 % ( 2 )

Promix-SM305.10

4.55 % ( 1 )

Special attention!

The reliability of any lock is determined by its class or resistance to opening. In total, there are four classes, of which the first is devices with the weakest security properties.

The fourth class, accordingly, is assigned to the most reliable locking mechanisms. The second, third and fourth classes are subject to mandatory certification, which is authorized to be carried out only by organizations and divisions that have the appropriate licenses. Therefore, for security reasons, it makes sense to study the accompanying documentation before purchasing a lock.

No matter how reliable it is, improper installation of the lock can affect both its service life and its security properties. It is better to trust such work to specialists, because dubious savings on the wages of a specialist can affect the safety of the site and your wallet. The only exception, perhaps, may be the unpretentious mechanics of not high class.