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Replacing uPVC Window Handles It is simple to swap the handles on windows made of Upvc. It is important to ensure that the replacement handle fits the spindle that was cut out of the window mechanism. If the steps below are followed properly, any cockspur handle should fit in most windows. The most important thing is the step size of the handle. What to Look For A lot of windows in the UK come with uPVC handles and, over time, they will begin to show signs of wear and tear. The handle on the window can becom