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How to Replace UPVC Window Handle The kind of handle or lock you have is the first thing to think about when replacing a upvc window handle. In-line Espagnolette handle is a standard choice that can be used with any UPVC window that is equipped with a crank system (where handling is required). You can remove the spindle by opening the window 90 degrees, then rotating the screw or pin. Spindle To replace window handles made of upvc, you must first ensure that the handle is compatible with the window type a