UPVC Door Lock Measuring Guide

When trying to identify any multi-point lock, there are 2 main criticial dimensions required (always measured in millImetres).

What are the 2 critical dimensions?

1. The PZ dimension - measured from the centre of the spindle (follower) hole to the centre of the euro cylinder hole. 

2. The ‘Back Set’ dimension - Measured from the front of the lock face plate to the centre of the spindle (follower) hole.