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Choosing a Double Glazed Window Handle Double-glazed windows that have the correct handle will be more secure and efficient in energy use. You can put in new handles or replace older handles on your window. There are a variety of handles. One of them is the cockspur handle. It is a spur that snaps on to the striker in the shape of a wedge. In-line UPVC handles are straight and pivot left or right, whereas cranked ones come in right and left versions. These handles are compatible with multipoint locks to offer security. Easy to use There are many dif