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How to Replace UPVC Window Handle The kind of handle or lock you are using is the first thing to consider when replacing a upvc window handle. The handle that is in-line with Espagnolette is a standard option that will fit any UPVC window that has a cranked system (where handling is required). You can remove the spindle by opening it 90 degrees and rotating the pin or screw. Spindle To replace window handles made of upvc first, make sure that the handle is compatible with the type of window and locking system.