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Choosing a Replacement Upvc Door Handle When choosing the correct replacement handle made of upvc, ensure that it is in line with your door's screw fix centre and PZ measurement. These will usually be located on the backplate of your handle. Most handles have spring cassettes that assist in keeping the lever in an upright position. If your upvc handle seems loose, it could be that the spring has become damaged. Inline Lever/Lever The lever/inline lever has a modern design that fits perfectly into