The Complete Guide to Euro Cylinder Locks
Euro cylinder locks (also called euro profile cylinders) are found in over 80% of UK homes. They're the standard lock mechanism used in uPVC and composite doors. However, not all euro cylinders are created equal - and choosing the right one is crucial for your home security.
What is a Euro Cylinder Lock?
A euro cylinder is the replaceable part of your lock that your key goes into. It fits into a multipoint locking system and is secured by a single screw. When you turn the key, it activates the locking mechanism.
Key characteristics:
- Keyhole on one or both sides
- Standard size fitting
- Can be replaced without changing the entire lock
- Available in various security levels
The Problem: Lock Snapping
Standard euro cylinders have a critical vulnerability: they can be snapped in under 30 seconds using basic tools. This is the #1 method burglars use to break into UK homes.
How lock snapping works:
- The burglar applies force to the cylinder (using grips or a screwdriver)
- The cylinder snaps at its weakest point
- The remaining portion is easily manipulated to open the lock
Anti-Snap Lock Cylinders: Your Solution
Modern anti-snap cylinders have built-in protection:
| Feature | What It Does |
|---|---|
| Anti-snap | Sacrificial cut-line breaks away but protects the mechanism |
| Anti-bump | Prevents the "bump key" attack method |
| Anti-pick | Special pins resist picking attempts |
| Anti-drill | Hardened steel pins prevent drilling |
| Anti-extraction | Prevents pulling the cylinder out |
Understanding Security Ratings
# British Standard Kitemark (BS TS007)
| Rating | Security Level | Features |
|---|---|---|
| 1 Star | Basic | Anti-bump only |
| 2 Star | Good | Anti-bump + handle protection |
| 3 Star | High | Cylinder + handle combined OR Diamond standard |
Note: For insurance compliance, you typically need at least a 3-star rated lock.
# Sold Secure Diamond
The Sold Secure Diamond standard is considered the gold standard for euro cylinder security. Products with this rating have been independently tested against attack.
How to Measure Your Euro Cylinder
To replace your cylinder, you need three measurements:
- Inside measurement: From the screw hole to the internal edge
- Outside measurement: From the screw hole to the external edge
- Total length: Combined measurement
Typical UK sizes: 35/35, 40/40, 45/45, 35/45, 40/50
Types of Euro Cylinders
# 1. Double Cylinder (Key Both Sides)
- Key required to lock/unlock from both sides
- Most secure option
- Can be inconvenient in emergencies
# 2. Thumbturn Cylinder
- Key on outside, thumbturn on inside
- Convenient for quick exit
- Ensure it's "clutch" type to prevent letterbox fishing
# 3. Half Cylinder
- Used for garage doors
- Only has keyhole on one side
Top Recommended Anti-Snap Cylinders
Budget-Friendly:
- UAP+ 3 Star
- Avocet ABS
Mid-Range:
- Ultion Standard
- Yale Platinum
Premium:
- Ultion Plus
- Brisant Ultion
- ABS Master
Should You DIY or Call a Locksmith?
DIY is possible if:
- You can measure accurately
- The door isn't damaged
- You're comfortable with basic tools
Call a locksmith if:
- You're unsure about measurements
- The lock mechanism has other issues
- You want professional advice on security
- You need the job done quickly and correctly
How Much Does Euro Cylinder Replacement Cost?
| Service | Typical Price |
|---|---|
| Standard cylinder (supplied & fitted) | £60 - £100 |
| Anti-snap 3-star cylinder (supplied & fitted) | £100 - £180 |
| Premium Ultion/ABS (supplied & fitted) | £150 - £250 |
*Prices include supply and fitting by a professional locksmith.*
