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Replacing uPVC Window Handles It is simple to change the handles on windows made of Upvc. It is essential to ensure that the replacement handle fits into the spindle cutouts in the window mechanism. If follow the steps below, any cockspur handle will fit on most windows. The height of the step of the handle is key. What to Look For Over time, uPVC handles on many windows in the UK begin to show signs of wear and wear and tear. The handle of the window can becom