Upvc/Composite Door Lock
Cylinder BS Upgrade

The weak point of any UPVC or Composite door that uses a multi-point lock is the cylinder, which can be attacked in many different ways

We carry a selection of British Standard cylinders ranging from 1-star to 3-star

Our ZONE cylinder security range starts at £30.00 + vat and features:

High security euro profile cylinder locks. British Standard EN 1303:2015 1 Star rated. Sold Secure SS132 Gold Level. Dual finish - chrome body and brass plug. Supplied with 3 keys. 10 year Guarantee. 6 pin.

1500 dual plus
1500 dual plus

Our APECS AP maximum security door lock range starts at £50.00 + vat and features:

The APECS AP is our BSI 3 Star Kitemark, Sold Secure Diamond Standard Euro Cylinder which offers maximum protection. It safeguards from all forced methods of attack ranging from snapping, drilling, plug-extraction, picking and bumping.

The APECS AP cylinder is specifically designed to protect from unauthorised access by burglars. The AP cylinder is engineered with a unique sacrificial point, which when tampered with externally sets an interlocking cam mechanism into action, preventing any further damage to the internal parts of the cylinder, whilst still keeping the lock operable from the inside.

In the event of snapping, the home owner can still operate the door and exit the property due to the lock's unique mechanism which is engaged when the cylinders external section is snapped off. This mechanism slides the clutch into place, preventing further external damage and manipulation of the cam, whilst keeping the lock operable from the inside.

The APECS AP euro cylinder is available with 5 keys and this can be selected when ordering.

What is the button on the AP Cylinder used for?

The button the thumbturn AP cylinders allows the customer to exit the property if the lock has been damaged on the external side. The technology on our AP means that if the cylinder is snapped on the external side, the internal mechanism cannot be tampered with, meaning that the homeowner can still exit the property. This is usually done by using the key, but with our Thumbturn cylinders, this is done using the button.

What is the APECS up to £2500 Break In Guarantee?

To give you total peace of mind, in the unlikely event of a break-in succeeding through a snapping attack on our cylinder, we will pay up to £2500 towards the loss of any items which are not covered by any of your household insurance policies.

Security Information

  • Anti-pick: 4 pins on each side
  • Anti-bump: double locking mechanism with slider in combination with a unique shallow chamber
  • Anti-drill: 2 pins on each side of the cylinder shell + 5 on each side in the cylinder core
  • 1 steel driver pin on each side
  • Snap-secure sacrificial point
  • Dimple and slider hybrid key profile
  • 10-year guarantee
  • 5-year snap-secure guarantee

Unique Features

  • Double locking mechanism with additional track rail pins
  • Patented interlocking mechanism and hardened cam protection block prevents from snapping and plug extraction
  • Patented ball-bearing connection ensures additional operation smoothness and strong fixing between the cylinder core and the cam
  • Operable from inside when lock is tampered with externally


  • BSI 3 Star Kitemark – KM621947
  • Sold Secure Diamond Standard – CLME08161454
  • Tested to TS007:2014 + A2:2018
  • Tested to EN1303:2015 — 160B0C6D

Call for a free no obligation survey without the hard sell or if you just more information about Cylinder snapping

Prices start from £105.00 plus vat Fitted For Zone 1 Star BS Anti - snap Cylinders

What is Cylinder snapping? BBC Inside out



Moulsham Mill Business Centre, Parkway, Chelmsford, Essex CM2 7PX

Locks4Less Locksmiths Chelmsford

We are a small local locksmiths servicing Chelmsford offering local locksmith services. We are not a call Centre or franchise, when you call you will speak to Arthur the locksmith direct. For great value local rates.

Call now Freephone 0800 5429995 or 01245 860051.


Moulsham Mill Business Centre, Parkway, Chelmsford, Essex CM2 7PX