Cylinder Locks
Our range of cylinder locks includes high security TS007 rated anti-snap barrels, double euro cylinder locks and thumb turn euro cylinder options to suit external doors, internal doors and retrofit security upgrades. Trusted for easy replacement, enhanced anti-drill, anti-snap and anti-bump protection, these door lock cylinders deliver reliable security for homes, commercial premises and rental properties while offering versatile fitment and keying choices for locksmiths and DIY installers alike.
At Locks & Handles, we also offer cylinder lock replacement parts and add-ons that locksmiths can use to replace part of a cylinder lock or to bolster a lock and add even more security features. Choose from an exhaustive range of cylinder and barrel lock models, all from respected brands like TSS, Union, Yale, ERA, ABS, and many more.
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ABS Euro Double Cylinders British Standard Kitemarked TS007 3*
Price range: £33.99 through £65.15 Read more -
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ERA Invincible Double Cylinders British Standard Kitemarked TS007 3*
Price range: £27.91 through £34.68 Read more -
ERA Invincible Key & Turn Cylinders British Standard Kitemarked TS007 3*
Price range: £33.93 through £40.08 Read more -
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Cylinder Locks & Barrels (Euro Cylinder Locks)
Cylinder locks, commonly referred to as lock barrels, are the key-operated component of a locking system that controls access by rotating an internal cam when the correct key is inserted. Cylinder barrels are typically installed within door handles or lock cases and operate the locking mechanism, commonly within multi-point door locks, mortice locks and rim locks.
The most widely used cylinder type in the UK is the Euro-profile cylinder, often described as a barrel-shaped lock component and commonly fitted to uPVC, composite and aluminium doors. Euro cylinders are designed to operate multi-point locking systems and compatible lock cases, allowing the cylinder to be replaced independently of the full lock.
Euro cylinder barrels are available in several configurations, including double cylinders (key both sides), key & thumb turn cylinders, and single cylinders, allowing selection based on security requirements, emergency egress and user convenience. Alternative profiles such as oval cylinders and rim cylinders are also available for specialist locking systems.
Cylinder barrels are manufactured in a wide range of internal and external size combinations to suit different door thicknesses and handle projections. Cylinder size is measured from the centre fixing screw to each end of the barrel, commonly shown in split sizes such as 35/35, 40/50 or 45/50. Correct sizing is important, as cylinders should sit flush or slightly recessed within the handle or escutcheon to reduce exposure and improve security performance.
Modern cylinder locks are manufactured to recognised UK and European performance standards including BS EN 1303, which grades durability, corrosion resistance, fire performance and resistance to attack. Higher security cylinder barrels may also meet TS007 3-Star certification, a widely recognised UK benchmark for testing cylinder and handle security performance.
Older cylinder designs offered limited resistance to certain forced-entry techniques. Modern anti-snap cylinder barrels incorporate reinforced construction and sacrificial sections designed to improve resistance against anti-snap, anti-drill, anti-pick and anti-bump attack methods. Replacing a cylinder barrel is typically straightforward and usually avoids replacing the complete locking mechanism, making cylinder upgrades a practical and cost-effective security improvement.
Buyer Guidance – Choosing a Cylinder Lock or Barrel
| Consideration | Guidance |
|---|---|
| Cylinder Type |
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| Security Rating |
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| Cylinder Size |
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| Keyed Alike Cylinders |
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| Compatibility |
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| Cylinder Build Quality |
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Cylinder Locks & Barrels – Key Facts
| Topic | Key Information |
|---|---|
| Common Cylinder Format |
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| Cylinder Variations |
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| Performance Standards |
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| Security Features |
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| Cylinder Sizing |
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| Replacement Component |
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| Typical Upgrade Cost |
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Cylinder Lock Security Upgrade Guide
| Upgrade Option | Key Benefits |
|---|---|
| Anti-Snap Cylinder Barrels |
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| TS007 3-Star Cylinders |
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| SS312 Diamond Cylinders |
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| Security Door Handles (2-Star TS007) |
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| Correct Cylinder Sizing |
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When Should You Replace a Cylinder Barrel?
| Situation | Reason |
|---|---|
| Lost or Stolen Keys |
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| Moving Into a New Property |
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| Worn or Stiff Cylinder Operation |
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| Outdated Cylinder Security |
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| Following Attempted Break-In |
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| Security Upgrade |
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Security & Quality Assurance
At Locks & Handles we supply cylinder locks and lock barrels manufactured to recognised UK and European testing standards, including BS EN 1303 and TS007 certification where applicable. Many cylinder barrels also incorporate tested anti-snap, anti-drill, anti-pick and anti-bump protection features.
Selecting the correct cylinder security rating helps ensure compatibility with locking systems, supports long-term durability and maintains effective door security performance. Below is a clear comparison of Standard, 1-Star and 3-Star cylinder locks.
Cylinder Lock Security Rating Comparison
| Feature | Standard Cylinder | TS007 1-Star Cylinder | TS007 3-Star Cylinder |
|---|---|---|---|
| Security Level | Basic | Enhanced | High Security |
| TS007 Rating | Not rated | 1-Star | 3-Star |
| Anti-Snap Protection | No | Partial (requires 2-Star handle for full protection) | Yes – built-in anti-snap protection |
| Anti-Drill Protection | Limited | Yes | Yes (reinforced protection) |
| Anti-Pick Protection | Basic pins | Enhanced pins | Advanced security pins |
| Anti-Bump Protection | No / Minimal | Yes | Yes |
| Insurance Approved | Usually not | Often compliant when paired with 2-Star handle | Yes – typically insurance compliant |
| Best For | Internal doors / low-risk areas | Standard residential front/back doors | High-risk areas / main entry doors |
| Recommended For uPVC & Composite Doors | Not recommended | Suitable | Highly recommended |
| Price Level | Low | Mid-range | Premium |
Frequently Asked Questions
What is a cylinder lock or barrel?
A cylinder lock, often called a lock barrel, is the key-operated part of a lock that rotates an internal cam to engage or disengage the locking mechanism.
What is a Euro cylinder lock?
A Euro cylinder is a standardised lock barrel commonly used in UK door locking systems, particularly multi-point locks fitted to modern doors.
What does TS007 3-Star mean for cylinder locks?
TS007 3-Star is a UK security rating confirming the cylinder has been independently tested against snapping, drilling, picking and bumping attacks.
How do I measure a cylinder barrel?
Cylinder size is measured from the centre fixing screw to each end of the barrel, typically shown as split sizes such as 35/35, 40/50 or 45/50.
Can cylinder barrels be replaced without replacing the full lock?
In most cases, yes. Euro cylinder barrels are designed to be replaced independently of the lock case or multi-point locking system.
What is the difference between double and thumbturn cylinders?
Double cylinders require a key on both sides. Thumbturn cylinders allow internal locking using a turn knob without a key.