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Choosing a Replacement Upvc Door Handle Selecting the right replacement upvc door handle involves making sure that it matches your existing doors PZ measurement and screw fix centres. They are usually located on the backplate of the handle. Most handles come with spring cassettes that help keep the lever of the handle in a horizontal position. If your upvc handle seems loose, it could be that the spring has become damaged. Inline Lever/Lever The inline lever/lever is a modern handle design that fits perfectl