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Types of UPVC Door Handles It's important to choose the right replacement handle made of upvc for your home if handles are in need of replacement. Locksmiths can supply and install high-security uPVC door handles with extra security features. The most important measurements are measurement A (known as PZ) and the length of the backplate (measurement F). Check these measurements to ensure that your new uPVC handle will fit. Lever/Lever A lever is a rigid rod that pivots around a point. When you apply force t