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How to Replace UPVC Window Handle The type of handle or lock you own is the first thing to consider when replacing a upvc window handle. In-line Espagnolette handles are a common option that can be used in any UPVC window with an operating mechanism that is cranked (where handing applies). You can remove the spindle by opening the windows 90 degrees and rotating the pin or screw. Spindle To replace the window handles made of upvc, you must first ensure that the handle is compatible with the window type a