Last updated: 16/10/2022

Welcome to our big Abus locking cylinder test 2023. Here we present all the Abus locking cylinders that we have tested in detail. We have compiled detailed background information and added a summary of customer reviews on the web. We would like to make your purchase decision easier and help you find the best product for you.

You will also find answers to frequently asked questions in our guide. If available, we also offer interesting test videos. Furthermore, you will also find some important information on this page that you should definitely pay attention to if you want to buy an Abus locking cylinder.


  • Mortise locks come in a variety of shapes and colours. Which one exactly you need must be clarified in advance with the dimensions and the requirements.
  • Mortise locks are available with and without a bolt. The bolt is used to additionally lock the door after it has been closed and thus provides even more security and burglary protection.
  • To avoid problems when installing a mortise lock, you need to determine the exact backset and buy the right lock for a DIN-right or DIN-left orientation. Afterwards, installation is child’s play.

The Best Mortise Lock: Our Picks

Guide: Questions you should ask yourself before buying a mortise lock

How does a mortise lock work?

There is probably a mortise lock in every door in Germany. But because doors need different functions, as they are used in different places, for example in public buildings or as house doors, there is always a need for different construction techniques. A mortise lock works very simply.

With the help of a lever, the door handle or the key from the outside, the so-called latch, which keeps the door closed when it is unlocked, is moved in or out. When the handle is pressed down, it is retracted, and when it is released, it is retracted again and locks the door again. There are also mortise locks that have an additional locking function, as they are designed for external doors that need to be locked, for example.

The lock works in such a way that when the key is turned from the outside, first the bolt is unlocked and then automatically, when the door is unlocked, the latch is turned inwards by turning it, as with the handle mechanism, and the door can be opened.

Why do I need a mortise lock?

Normally, every door needs a mortise lock to be able to hold the door. This is because the latch secures or holds the door to the door frame. This means that without a mortise lock, it is difficult to close a door at all, and for doors that separate the inside and outside areas, this must be possible.

What alternatives are there to mortise locks?

There are now also other types of locks. First of all, the fingerprint scanner lock. This opens the door with the help of the registered fingerprint that is authorised to open this door. This serves as an alternative in that it no longer requires a keyhole or mortise lock. Only the mechanism of the finger is used to open the door.


The fingerprint sensor of a door works like a mobile phone. You have to put your finger on a certain spot to open the door.
(Image source: Sabellano)

As a second alternative, you can choose door locks with a combination of numbers. Here, no key is needed, but the correct combination of numbers must be entered in order for the door to open.


Door lock with number combination to open. Another alternative to the classic mortise lock.
(Image source:

Decision: What types of mortise locks are there and which is the right one for you?

What distinguishes a mortise lock with a Buntbart hole and what are its advantages and disadvantages?

The low-priced Buntbart lock got its name from its appearance. While normal locks have a round head and go down narrowly, the Buntbart hole opens up towards the bottom like a semicircle, making it look as if the head of the key has a beard. Buntbart precedes beard because this lock can also be made in all variations or colours and shapes.

The disadvantage of the bearded lock is its low security standard, but that is why this mortise lock is used for interior room doors, where a high level of security does not normally have to be guaranteed. In addition, the Buntbart mortise lock cannot be installed in security doors, as it cannot provide smoke or fire protection.

  • Cheaper to buy
  • Available in all shapes and colours
  • More for interior doors
  • Not suitable for security doors

What distinguishes a Chubb mortise lock and what are its advantages and disadvantages?

The Chubb mortise lock is a further development of the Buntbart lock. For the first time, the keys of the Chubb lock have been given several prongs at the bottom end and thus lift up small locking tumblers with the different lengths of the prongs and thus open or close the door.

The bolt of this mortise lock also allows the entire door to be locked by turning it twice, which works in exactly the same way as opening the locking tumblers. Since this type of mortise lock is no longer the most modern, as it usually has a very bulky key, it is no longer used on house or flat doors.

This was the case until about the 1960s, but it has been largely superseded by modern variants. In addition, there are further developments of the Chubb mortise lock, which is now used to lock safes or prison cells. However, these are only the latest models.

  • Multiple tumblers
  • With bolt
  • Latest models for safes or prisons
  • Bulky key
  • No longer normally used for house and flat doors

What distinguishes a mortise lock with a PZ hole and what are its advantages and disadvantages?

A mortise lock with a PZ perforation is the most common variant installed in Germany today.

PZ perforation or profile cylinder is also used for entrance doors. There are two different locking mechanisms for the cylinder lock. One is the keyed alike system or the keyed different system. There are also emergency and danger functions that ensure the door can be opened if the key is still inserted on one side.

It is also suitable for security doors, as it usually offers fire, drilling and smoke protection. With a mortise lock, however, special care must be taken to ensure that it is inserted correctly, as incorrect insertion or overhanging of the lock can lead to security problems.

In addition, you have to find out exactly which model you really need for a PZ hole because, as already mentioned, there are different functions and mechanisms that have different security standards. However, if you would like more detailed information on this, you are welcome to read the article on ABUS locking cylinders.

  • Suitable for entrance doors
  • Various locking mechanisms
  • High security standards possible
  • Not the easiest to install
  • Different models have different security

What distinguishes a mortise lock with a bathroom bolt and what are its advantages and disadvantages?

A mortise lock with a deadbolt is a key-free lock. The lock is opened with a knob that manually opens or closes the lock. This makes it easy to use in rooms that are often opened or closed during the day.

However, as this type does not offer a high standard of security, since the door can be opened from the outside with a flat object, this mortise lock with bathroom bolt is only used for bathrooms. Of course, it can also be fitted to other interior doors, but the normal case is the bathroom door.

  • No key
  • Easy opening and closing
  • Exclusively for bathrooms
  • No high security

Buying criteria: You can compare and evaluate a mortise lock based on these factors


Mortise locks can be made of different materials. Often, different elements of the mortise lock are made of different materials. Normally and one of the most secure materials is stainless steel. Often, entire mortise locks are made of stainless steel, but there are also variants where the bolt and the latch are made of metal. Zinc is also often found in mortise locks.

They are often made of a stainless steel core and a zinc shell. All in all, the most positive feedback is on stainless steel mortise locks, but metal locks can also be a secure option. However, if the mortise lock is made of a different material, which has not been mentioned so far, a second opinion or advice should be sought from a consultant shop.

Security standard

The security of mortise locks is measured by the purpose for which the mortise lock can be used. As already described above, there are different types of mortise locks.


Mortise lock without a key, but with a handle on both sides and only a latch and no deadbolt.
(Image source:

Accordingly, a mortise lock with PZ holes offers the highest security, while a mortise lock with a bathroom bolt could not avert a drilling incident or similar. The material of the mortise lock must also be taken into consideration, because a pure zinc lock cannot and is not as secure as one made of stainless steel. Therefore, before buying, it must be carefully considered for exactly which door the mortise lock has to be bought and what material it is made of.

Backset dimensions

The backset is a measurement that only exists for mortise locks. It is the distance from the centre of the keyhole and the square that secures the mortise lock to the outer edge of the mortise lock. Doors can have different backsets, so if you want to replace the mortise lock, it is important to measure the distance of the old lock in advance. A typical backset for solid doors is 65 mm. Since backset is always given in millimetres.


Before buying a mortise lock for your door, you need to know in advance whether the door is a DIN left-closing door or a DIN right-closing door. Here, you have to consider the direction in which the door opens.

The door is a DIN right-closing door if the door hinge is on the right from the point of view and therefore also opens to the right. This in turn means that the closing mechanism engages on the left-hand side. The other applies for DIN-left. Depending on what kind of door you have, you will then have to buy a DIN-right or DIN-left mortise lock.

Facts worth knowing about mortise locks

How do I open a mortise lock without a key?

A normal mortise lock can be opened with the help of a card, such as a credit card, identity card or similar. To do this, however, the door must not have been actively locked, but must only have fallen shut so that the latch has only closed the door. Then insert the card above the lock between the door and the door frame. Then slowly try to get the card close to the trap and slowly get it in between and then push the trap in.

With a little patience, you can open the door and save yourself an expensive locksmith.

Picture source: Ryzhov/