How to prevent lock snapping
The most effective way to prevent lock snapping is to fit a 3-star TS007 anti-snap cylinder, ensure the cylinder does not protrude beyond the door handle, and use security handles where appropriate. Below, we explain how lock snapping works, how to check whether your lock is vulnerable, and the upgrades that offer the best protection.
What is Lock Snapping?
Lock snapping is a method of forced entry that targets certain euro cylinder locks, commonly found on uPVC, composite and aluminium doors.
The attack involves applying force to the exposed part of the cylinder until it breaks. If the lock is vulnerable, this can expose the internal mechanism and allow the door to be unlocked.
Older and lower-security euro cylinders can be particularly vulnerable because they were not designed to resist this type of attack.
Modern anti-snap cylinders are built differently. They are designed to resist snapping or to break in a controlled way that prevents an intruder from reaching the part of the lock needed to open the door.
The good news is that improving protection against lock snapping is usually relatively straightforward. In many cases, the existing euro cylinder can be replaced without changing the entire door or locking system.
Is my lock vulnerable to lock snapping?
If your front or back door uses a euro cylinder, it is worth checking what type of lock you currently have fitted.
A protruding cylinder is particularly worth checking. If too much of the lock extends beyond the surrounding handle or security furniture, it may provide additional leverage during an attempted attack.
This does not necessarily mean your door is insecure, but it is a good indication that the lock should be inspected.
If you are unsure, a locksmith can usually identify the type of cylinder fitted and advise whether an upgrade would offer worthwhile additional protection.
A euro cylinder is the part of the lock where you insert your key. They are extremely common on uPVC and composite doors, but not all euro cylinders offer the same level of protection.
- You do not know when it was installed
- It is an older standard euro cylinder
- There are no visible security markings
- The cylinder protrudes noticeably beyond the door handle
- The lock or handles feel loose or damaged
- You recently moved into the property and do not know the security history of the doors
How to identify an unsafe euro cylinder
An older or poorly fitted euro cylinder may be more vulnerable to attack.
Things to look for include:
- no visible security markings
- a cylinder that sticks out beyond the handle
- loose or damaged door furniture
- an old lock with no known security rating
If you cannot identify the cylinder or its rating, it is worth having it checked.
Best ways to prevent lock snapping
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The best protection is a combination of a secure cylinder and correct installation.
- Fit a high-security anti-snap cylinder.
- Make sure the cylinder is the correct size.
- Use security handles where appropriate.
- Check the condition of the door, frame and locking mechanism.
- Have the lock professionally fitted if you are unsure.
For most homes, upgrading the cylinder is one of the simplest ways to improve resistance to lock snapping.
What lock should I buy?
Look for a high-security euro cylinder designed specifically to resist snapping.
A TS007 3-star rated cylinder is a strong choice for many external doors.
The correct size matters too. A good security cylinder should sit neatly within the door furniture rather than protruding unnecessarily.
Avoid choosing a lock purely because it is labelled “anti-snap”. Recognised independent security testing is a better indicator of quality.
You could also opt for a 1-star cylinder + a 2-star handle for the same level of protection.
How much does an anti-snap lock cost?
The price varies depending on the brand, security rating and whether installation is included.
A higher-security cylinder will usually cost more than a basic replacement, but the fitting itself is often straightforward.
For an accurate price, the door type, cylinder size and existing hardware need to be taken into account.
Lincoln Security can help you work this out, if you give us a call on 01522532038
Frequently Asked Questions
Look for security markings on the cylinder or check the manufacturer and model.
No. Modern high-security cylinders are designed to resist snapping and other common attacks.
Ideally, no. Excessive protrusion can make the cylinder easier to attack.
Yes, in some cases, but correct sizing is important.
Usually not. In many cases, the cylinder can be upgraded on its own.
If it is a rated doorset, then changing any part of it can void the rating.