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Types of UPVC Door Handles It is crucial to select the appropriate replacement handle made of upvc for your home when your handles are in need of replacement. A locksmith can provide and install high-security uPVC door handles with extra security features. The most important measurements you should take are the measurement A (also known as PZ) as well as the length of the backplate. Take these measurements to make sure your new uPVC handle will fit. Lever/Lever A leve