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Choosing a Replacement Upvc Door Handle The best choice for a replacement upvc door handle involves making sure it is in line with your existing doors PZ measurement and screw fix centres. These will usually be found on the backplate of your handle. Most handles come with spring cassettes that keep the lever of the handle in the horizontal position. If your handle is loose, it could be that the spring has become damaged. Inline Lever/Lever The lever/inline has a modern design that perfectly fits into the