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Choosing a Replacement Upvc Door Handle The best choice for a replacement door handle made of upvc involves making sure that it matches the measurement of your current door's PZ and screw fix centres. They are typically on the backplate. Most handles have spring cassettes to assist with keeping the lever in an upright position. If your upvc handle is floppy, it could be that the spring has degraded. Inline Lever/Lever The inline lever/lever has a modern design that fits perfectly into the Fab and Fix portfo