What is Most Secure Lock To Prevent Lock Snapping?

Most Secure Lock to stop Lock Snapping image

Lock Snapping is a growing security concern, as experts in door and lock security the Master Locksmiths Association recommend 3 different ways to prevent lock snapping. There are many different types of lock cylinder on the market, most people are now asking which cylinder for their front or back door is the most secure and ultimately will help protect them against lock snapping.

If you are looking to replace your door lock and protect against lock snapping then using one of the below three methods will help protect against this method of attack.

What rating should my lock cylinders have?

1. SS312 Diamond Approved Standard

We believe that you can minimise your risk of being a victim of lock snapping by ensuring the lock you purchase has the Sold Secure ( SS312 ) Diamond Standard Approval. We recommend viewing Sold Secure’s Approved Diamond Cylinder list (external link to the Sold Secure Approved Products Website).
The following manufacturers have cylinders approved to SS312 Diamond; Avocet, APECS, Brisant, ERA and Federal.

Avocet ABS and ATK Diamond Grade Anti Snap Lock Cylinders image

An example of SS312 Approved Lock Cylinders from ABS Home Security & Safety / ABS 312 Cylinder


Brisant Ultion Anti Snap Lock Cylinder

The Brisant Ultion is SS312 Diamond Approved

2.  TS007 3star cylinder

An alternative specification to look out for is the TS007.  BSI Kitemark to this specification however it is important to note that there is a star rating associated with this.

In order to protect against lock snapping a 3 star rating needs to be reached.  In order to achieve this you can use a 3 star cylinder.  We recommend that a 3rd party approval of this standard is sought.

For example look for the 3 star kite mark logo. See a list of Kitemarked Lock Cylinders here (external link to the British Standards Institute’s Website) from leading manufacturers such as:  ABUS, Assa Abloy UK,  Avocet, ERA, Eurospec, Imperial Locks, Kaba, Mul-T-Lock, UAP.

Asec diamond lock cylinder

ASEC lock cylinder is an example of a 3 star kitemark rated cylinder that helps prevent lock snapping


kitemark 3 star logo

Look for the 3 star Kitemark standard to prevent lock snapping

3. 1 star Kitemarked Cylinder in conjunction with 2 star Kitemarked door furniture  ( e.g. door handles, escutcheons )

An alternative to the simple 3 star cylinder option is to have a 1 star cylinder protected by 2 star approved door furniture, for example security handles or a cylinder guard.

1 star kitemark lock cylinder

A 1 star kitemark lock cylinder with 2 star kitemark door furniture will prevent against Lock Snapping


2 Star Door Handle

2 star kitemark door furniture with 1 star kitemark lock cylinder will prevent against Lock Snapping

The complexity of these standards is why you should seek specialist advice from your local vetted, inspected and qualified locksmith.

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to discuss fitting Anti Snap Locks

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Steffan George

Hi there - I'm director of business development here at the Master Locksmiths Association. Feel free to add me to your circles on Google + by visiting my Steffan George profile. I'm also on Twitter @Steffan_MLA