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Types of UPVC Door Handles It is essential to select the right replacement Upvc handle for your home if handles made of upvc require replacement. A locksmith can provide and install high-security uPVC door handles with extra security features. The most important measurements to consider are the measurement A (also known as PZ) and the length of the backplate. Please check these measurements to ensure your new uPVC handles will fit. Lever/Lever A lever is a rod that pivots around a point. When you apply forc