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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 your handles made of upvc require replacement. A locksmith can supply 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). Please check these measurements to make sure that your new uPVC handles will fit. Lever/Lever A lever is a solid bar pivoted around a point (known as a f