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Types of UPVC Door Handles It is crucial to select the correct replacement upvc handle for your home if 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 to take are the measurement A (also called PZ) along with the length of the backplate. Check these measurements to ensure the new uPVC handle will fit. Lever/Lever A lever is a rod that pivots around the p