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Choosing a Replacement Upvc Door Handle When you are choosing a replacement for your handle made of upvc, check that it matches both your door's screw fix centre and the PZ measurement. These will usually be located on the backplate of the handle. The majority of handles have spring cassettes that assist in keeping the lever in an upright position. If your upvc handle seems flabby, it could mean that the spring has deteriorated. Inline Lever/Lever The inline lever/lever is a contemporary handle design that f