If you’ve never replaced a lock before, it can be tricky to know where to begin! Use the steps below to gather the key details you’ll need to order the correct replacement lock.

- Description
- Delivery
- Help Measuring
Description
Multi‑fit centre case for ERA or Saracen Surelock mechanisms. Offered in 30 mm, 35 mm or 45 mm backsets with latch & deadbolt or latch & hook central locks. Designed for 92 mm centres and suitable for double‑spindle handles.
We know how important it is to get your door secure again quickly, which is why we keep delivery simple and reliable.
Free Next Business Day Delivery – all orders to mainland UK addresses are delivered the next working day at no extra cost.
Order Cut-Off Times – place your order before 3pm and we’ll dispatch it the same day for next business day day arrival.
Trusted Couriers – we work with leading delivery partners to ensure your lock arrives on time and in perfect condition.
Exclusions – some remote or offshore locations (such as the Highlands, Islands, and Northern Ireland) may take a little longer and could incur a small delivery charge.
Our goal is simple: fast, hassle-free delivery so you can get your multipoint lock fitted and your home secure without delay.
How do I Identify my uPVC Door Lock
Check for a Manufacturer’s Name
Look along the faceplate (the long metal strip on the edge of the door). Many locks have the brand stamped into the metal.
Identify the Locking Points
Look up and down the faceplate to see what locking mechanisms are fitted in addition to the latch and deadbolt. Example Answer: 2 Hooks and 2 Rollers
Measure the Backset (Measurement A)
The backset is the distance from the front edge of the faceplate to the centre of the keyhole (cylinder).
Measure the PZ / Centres (Measurement B)
This is the distance from the centre of the keyhole to the centre of the square spindle hole (where the handle goes through).