Last updated: August 6, 2021

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Cylinder locks form the basis for burglar-proof housing. Secure cylinders make it more difficult for burglars to gain access to flats, houses or garages. A high-quality and secure cylinder lock thus increases burglary protection and protects your belongings.

In this article, we have summarised the most important information about cylinder locks to make it easier for you to find the cylinder that best suits your needs. You will also find a list of the most popular and most frequently purchased cylinder locks.


  • A cylinder lock is not a door lock, but only a part of it. Before buying a new door lock, you should consider whether you want to buy the cylinder or everything new.
  • The size of cylinder locks is given in two parts (e.g. 25/30). This refers to the length of each side of the cylinder.
  • There are three different types of cylinder locks: Round, oval and profile cylinders. Profile cylinders are the most commonly used cylinder locks.

The Best Cylinder Lock: Our Choices

Below we have selected various cylinder locks for you. This should make your search for the right cylinder lock easier.

Buying and Evaluation Criteria for Cylinder Locks

In order to find the perfect cylinder lock, we have picked out some buying criteria that you should consider when buying. These criteria are intended to facilitate a comparison of the various cylinder locks so that you can make an objective and informed choice.

Cylinder lock lockable on both sides

If the cylinder lock can be locked on both sides, it can also be opened if a key is inserted from the other side. At first glance, this may seem a little less secure, but it can prevent worse in life-threatening situations, for example, because a person in a dangerous situation can open the door from both sides. This feature of the cylinder lock is indicated as an emergency and danger function in the product description.


Before you buy a cylinder lock, it is important to find out the dimensions of the cylinder. Often the size of the cylinder is indicated on the packaging and shows the length of both sides of the cylinder lock. Make sure that the desired lock has the correct dimensions, as these must fit the door and the mortise lock.

Cylinder lock must not be removable

Your desired cylinder lock must not be pull-out. Before buying, find out that the cylinder lock can be anchored with a screw that sits on the side. This feature is often present in modern cylinders, but is not guaranteed.


In order for the cylinder lock to protect the door against burglary, it must have certain security features. The cylinder lock must be protected against drilling and lock picking. Lockpicking is the opening of a lock with special tools. Cylinders in which the pins are irregularly placed protect against picking.

Drilling is also a variant of opening a cylinder lock. Cylinder locks with steel washers and extra pins offer greater protection against drilling.

Type / shape

Cylinder locks are available in various designs. They differ in type and shape. The different types include the double cylinder, the half cylinder and the cylinder with knob. Double cylinders can be locked from both sides. Half cylinders, on the other hand, can only be locked from one side. A cylinder with a knob can also be locked from both sides, on one side with a key, on the other side the knob is used for locking.

Cylinder locks are available as oval cylinders, round cylinders and profile cylinders. Oval cylinders and round cylinders are hardly ever used nowadays. As a rule, profile cylinders are used.

Guide: Frequently asked Questions about Cylinder Locks answered in Detail

In the following, we would like to answer the most important questions about cylinder locks. In this way, I would like to give you a deeper insight into the topic.

What is a cylinder lock?

A cylinder lock is a locking device. A lock cylinder is used here as a drive for the actual lock device.

How far may the locking cylinder protrude?

When installing the lock, you must ensure that the locking cylinder only protrudes by a maximum of 3 mm. The distance to the door's protective fitting is decisive for measuring. The smaller the measured distance, the more secure the door lock.

What does a cylinder lock cost?

The price is mainly determined by the functions and the security. The prices of cylinder locks can range from very low to high. The following table gives you an overview of what kind of cylinder lock you can expect for what budget.

Price range Available products
Low-priced (5 - 10 €) low-priced cylinder locks, few weaknesses
Medium-priced (25 - 99 €) good cylinder locks, rated as secure
High-priced (from 100€) high-quality and secure cylinder locks, particularly secure and often electronic

The table shows that high-quality cylinder locks that offer a high level of security are available for as little as €25.

How is a cylinder lock changed?

To remove a cylinder lock, the door must be unlocked, as a locking screw must be loosened from the side. Then the cylinder lock can be pulled out of the door.

The more security features a cylinder lock has, the harder it is for burglars to open the door. (Image source: TheDigitalWay / pixabay)

To install a new lock, proceed in the same way.


The market offers a wide range of cylinder locks, from the manufacturer to the size and the possible uses. However, before you buy a cylinder lock, you need to consider the following. First of all, you should inform yourself about the different types of cylinder locks. There are no longer only mechanical cylinders, but also electric ones that you can open via smartphone or pin.

After you have decided on the right variant, you have to measure the cylinder, as it has to fit the door. Other factors you need to consider are the security function and whether the cylinder lock should be keyed alike or differently.

(Cover photo: cocoparisienne / Pixabay)

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