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Types of UPVC Door Handles When your upvc door handle requires replacement, it is essential to find the right replacement for your home. A locksmith can supply and install high-security uPVC handles with extra security features. The most important measurements to take are the measurement A (also known as PZ) along with the length of the backplate. Take these measurements to make sure the new uPVC handle will fit. Lever/Lever A lever is a rod that pivots around the point. When you apply force to the end, the f