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Choosing a Replacement Upvc Door Handle When choosing the correct replacement upvc handle, you should check that it matches both the screw fix centre and PZ measurement. These will usually be located on the backplate of the handle. The majority of handles have spring cassettes that aid in keeping the lever in an upright position. If your handles from upvc are loose when they are opened, this could be due to the fact that the spring is deteriorating. Inline Lever/Lever The inline lever/lever is a con