Lock snapping, what is it and how can i beat it?


You may well have heard of “cylinder snapping” or “lock snapping“ or even the term “lock bumping”.   Lock snapping is a very common method used by burglars to break into a property that has a euro cylinder.

Euro lock cylinders are found on almost all properties that have UPVC doors, although a significant number of composite & aluminium doors use them too, and they’re often used in commercial as well as domestic environments.​​​​​​​

1. The Method of Lock Snapping The method of lock snapping involves breaking the cylinder to manipulate the lock to open. You may think having multi-locking points on your door make your home secure, it’s important to realise they are all operated by the cylinder. The cylinder is the weakest point and if compromised all the locking points are rendered useless.
Requires no specialist tools or knowledge – Various Police Forces are warning residents that lock snapping is a method of attack which requires no specialist tools or knowledge.
25% of burglaries – West Yorkshire Police Force has found that 25% of burglaries use this method of entry.

How an Anti Snap Lock can prevent a Burglary!

From the below image you can see how fitting by an anti-snap lock to these UPVC doors a burglary attempt has been stopped.

What lock above is used to stop the snapping?

The lock on the door protecting it from snapping is a 3* Break-secure euro cylinder lock. 

Look out for the 3 Star Kitemark Logo
If your lock has the 3-Star Kitemark Logo on it, this indicates the lock is tested against snapping.

The Kitemark logo can be found anywhere on the lock; it is usually found on either, the front or side of the euro cylinder.

How should the lock cylinder be correctly fitted?

Is vital the euro cylinder on your lock is installed correctly, below images show what the correct and incorrect ways a lock should be fitted.

Incorrectly Fitted Euro Lock Cylinder:
The pictures below show what incorrectly fitted cylinders look like​​​​​​​


The more of the cylinder that is accessible, the more prone it is to snap:


Correctly Fitted Euro Lock Cylinder

This is how a correct size specified and fitted cylinder should look.​​​​​​​

The cylinder should not protrude more than 3mm from the handle
Ideally should be completely flush with no external overhang.
The correct size of the cylinder it vital.

What 3* Break Secure Anti-Snap Locks Do we sell?

Mul-T-Lock Intergrator XP

Evva EPS 3* Break Secure 

Asec Kite Elite 3*

The above article can be found in its original format here, from the MLA.