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UPVC Door Handles Replacement Guide Replacing door handles made of upvc is a simple DIY project once you have the proper measurements. These measurements include the distance from the handle's backplate mounting centres (sometimes called PZ) to the centre of keyhole. The most commonly used uPVC handle has two inline levers. One is internal and the other exterior, linked with a spindle. They operate the multi-point lock which is used in uPVC, aluminium and some wooden doors. Brands and finishes A broken uPV