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UPVC Door Handles Replacement Guide Replacing upvc door handles is a straightforward DIY project 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 centre of keyhole. The most popular kind of uPVC door handle comes with two inline levers, one internal and one external that is connected via a spindle. They operate the multipoint lock on uPVC and aluminium doors, along with some wooden doors. Brands Finishes A broken uPVC door h