Buying a new cylinder lock? Read our guide.

Whether you're upgrading your cylinder locks for the first time, or just want the latest advice, we're here to help. Our cylinder lock buying guide will take you through the process from choosing a cylinder type, measuring your lock, and installing a cylinder lock in easy to follow steps.

Features

Half Cylinder

A Half Cylinder, sometimes called a Single Cylinder, is half the length of a regular cylinder. One side works with a key while the other side is blank, great when you only want to lock the door from one side.

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Half cylinder

Thumbturn

This type of cylinder works well on back doors or patio doors. On the outside the cylinder is locked by a key while on the inside you just need to twist the thumbturn. A Thumbturn Cylinder is also useful in an emergency when a quick exit is required - simply twisting the thumbturn will unlock the door.

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Thumbturn cylinder

Offset Cylinders

Most people need cylinders that are equal, which means from the centre screw hole, each side is exactly the same dimension.

On an Offset Cylinder, the external size to centre [A] and internal size to centre [B] are different, in our example measuring 30mm and 50mm. This type of cylinder is most commonly used on UPVC or Composite doors.

To measure an Offset Cylinder, check our measuring guide.

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Offset cylinder
Symmetrical Key

Symmetrical Key

Symmetrical keys are great in the dark. You can insert it either way, facing up or down because the cuts are identical on both the top and bottom. On a traditional key, the cuts are only along the bottom edge.

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Code Card

Code Card

A Code Card adds an extra level of security. This is useful if you deal with rental properties. To buy more keys or have keys cut by a locksmith, you've got to show your code card, meaning that only the owner of the lock can have extra keys cut.

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Fire Rated

Fire Rated

Designed for use with a timber fire door, a Fire Rated cylinder will keep the protective barrier intact during a fire. The cylinder will conform to European Standard EN 1634-1 and will be rated for 30 or 60 minutes.

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