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UPVC Replacement Door Handles Over time, the handles on your doors will wear out and need to be changed. When replacing them, it is important that the new handles conform to the exact dimensions of the previous handle. The top screw position the lever, and the keyhole sizes are the three measurements that you need to determine. Use the size guide to help you. Inline Lever/Lever A lever handle is a contemporary door handle designed to suit new or replacement doors. This kind of handle is av