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Types of UPVC Door Handles If your upvc door handle requires replacement, it is essential to find the right replacement for your home. Locksmiths can provide and install high-security uPVC handles with added security features. The most important measurements are measurement A (known as PZ) and the length of the backplate (measurement F). Please check these measurements to ensure that your new uPVC handles will fit. Lever/Lever A lever is a rod that pivots around the point. When you apply force to the end of th