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Types of UPVC Door Handles It is crucial to select the right replacement handle made of upvc for your home when your handles made of upvc require replacement. Locksmiths can provide and fit 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). Check these measurements to make sure your new uPVC handles will fit. Lever/Lever A lever is a solid bar that pivots around a central point (known as a