https://click4r.com/posts/g/18....269969/whats-the-job
UPVC Door Handles Replacement Guide Replacing the handles on your doors made of upvc is an easy DIY task when you have the right measurements. These measurements include the distance from the backplate of the handle's mounting centres (sometimes called PZ) to the center of the keyhole. The most commonly used kind of uPVC door handle is one with two levers inline, one internal and one external, connected by spindle. They are used to operate the multi-point lock which is used in uPVC