How to Choose a European Lock Cylinder

The Euro lock cylinder is an integral part of the UK’s home security system and there are several different types of locks designed to meet a range of protection needs. However, the standard cylinders on most doors are susceptible to a number of attack methods that criminals use to break into homes. Fortunately, there are a variety of anti-pick, anti-bump and anti-drill lock mechanisms that can help prevent these kinds of burglar attacks.

A European lock cylinder can be keyed on both sides or one side and a thumb turn can be added to allow key access from the inside without needing the key. This type of lock is commonly found in door handles, and it is often specified by landlords or property owners for communal entrance doors for flats, student accommodation or other managed properties.

When it comes to choosing a cylinder lock, the size of the door is important and there are various sizes available. For the best security, choose a larger cylinder that is at least 60mm in length. This will provide the maximum level of resistance to a snapping attack and will also help reduce the risk of key extraction.

Cylinder lock keys come in a number of shapes and sizes and there are different key combinations for different locks. The most common key is an A-E, although other keys are also available for keyed alike or differing systems. When choosing a cylinder key, consider the type of lock you have, how often it will be used and who will have access to it.

In order to ensure that your cylinder lock is secure, check whether it has a BS EN 1303 standard and a BSI kitemark or Sold Secure rating. These ratings are a guarantee that your lock is of a high quality and has been tested against the latest break-in techniques.

The weak point of a Euro cylinder is the gap left by the fixing hole that connects both sides of the lock body. This leaves very little metal that can resist severe pressure and if the lock is exposed to this kind of attack it will quickly fail.

To test a lock for this type of attack it is possible to apply a force that will quickly dismantle the lock by applying pressure at the end of the cylinder where it fits into the door handle. There are many tools on the open market that can easily do this.

To replace a European lock cylinder, start by isolating the existing lock by loosening the central screw that secures it and removing the cam tongue from the front of the lock body. Using a measuring tape and making sure the lock is fully extended, measure from the centre of the fixing screw to the face end of the lock, and then repeat this for the internal side of the door. If your lock is offset you will need to take both measurements separately as they may be slightly different.