Snapping a lock, also known as lock snapping, is a forceful and illicit technique employed by criminals to break into properties, specifically targeting euro cylinder locks.
Understanding Lock Snapping
Lock snapping is a method used by thieves to gain unauthorized entry into a property by exploiting a structural weakness in common euro cylinder locks. This technique involves applying significant force to the lock cylinder, causing it to break at a specific point, often near the central screw. Once the cylinder is snapped, the internal mechanism of the lock becomes exposed and accessible, allowing the intruder to easily manipulate it and open the door without a key.
Why Euro Cylinder Locks are Vulnerable
Euro cylinder locks are widely installed in many modern doors, including uPVC, composite, and some timber doors. Standard or older versions of these locks can have a design flaw: a narrow point in their construction that can shear under pressure. This vulnerability allows criminals to snap the lock by applying tools such as mole grips to the part of the cylinder protruding from the door.
How Lock Snapping is Carried Out
The process of lock snapping typically involves:
- Grip: The criminal uses a tool (e.g., mole grips, pliers) to firmly grip the part of the cylinder that extends beyond the door handle or faceplate.
- Apply Force: They then twist or pull with considerable force, concentrating pressure on the cylinder's weak point.
- Snap: The cylinder breaks in two, usually at the central fixing screw.
- Access: The outer section of the cylinder is removed, leaving the internal mechanism exposed. The burglar can then easily operate the lock to open the door.
Identifying Vulnerable Locks and Prevention
Not all euro cylinder locks are equally susceptible to snapping. Many modern locks are designed with anti-snap features.
Signs of a Potentially Vulnerable Lock
- The cylinder protrudes more than a few millimeters (typically 3mm or less is recommended) from the external handle.
- There are no visible certifications or markings (such as SS312 Diamond Standard or TS007 3-star rating) indicating enhanced security features.
- It is an older or basic euro cylinder without any specified anti-snap properties.
Protecting Your Property: Solutions
The most effective way to protect against lock snapping is to upgrade your door security.
- Install Anti-Snap Euro Cylinders: Replace existing standard cylinders with high-security anti-snap versions. Look for certifications like:
- SS312 Diamond Standard: This is a high-level test for cylinders, proving resistance to snapping, drilling, and picking.
- TS007 3-star rated: This signifies a cylinder that has passed rigorous tests for various attack methods, including snapping. Some 1-star cylinders can be combined with 2-star security handles to achieve a combined 3-star rating.
- Practical Insight: These upgraded locks are designed with sacrificial snap lines or reinforced materials, ensuring that even if attacked, the lock mechanism remains secure or the door cannot be opened.
- Upgrade Security Hardware: Consider installing security handles and escutcheons that protect the cylinder from being gripped or drilled.
- Ensure Proper Cylinder Length: Make sure your euro cylinder does not protrude excessively from the door or handle, as this makes it easier for criminals to get a grip.
| Vulnerability Type | Description | Prevention Method |
|---|---|---|
| **Standard Euro Cylinder** | Designed with a weak point prone to snapping under force. | Upgrade to a certified anti-snap cylinder (e.g., SS312 Diamond, TS007 3-star). |
| **Cylinder Protrusion** | Cylinder extends significantly from the door face, providing leverage. | Install flush-fitting security handles or ensure correct cylinder length. |
Importance of Professional Installation
While understanding the risks and solutions is vital, proper installation of security locks is paramount. Even the highest-rated anti-snap lock can be compromised if not fitted correctly. Consulting a qualified locksmith ensures that your locks are installed to the manufacturer's specifications and provide optimal protection against lock snapping and other forms of forced entry.
