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Choosing a Replacement Upvc Door Handle When selecting the right replacement upvc handle, you should ensure that it is in line with your door's screw fix centre and PZ measurement. These are usually located on the backplate. The majority of handles have spring cassettes that help keep the lever of the handle in an upright position. If your upvc handle seems flabby, it could mean that the spring has degraded. Inline Lever/Lever The inline lever/lever is a contemporary design that is perfect for the