https://sciencewiki.science/wi....ki/Why_Upvc_Door_Han
Choosing a Double Glazed Window Handle Double glazed windows that have the right handle will be more secure and efficient in energy use. You can put in new handles or replace the old ones on your home's window. There are many different types of handles that are available that include cockspur handles which have spurs that are locked onto the striker plate in the shape of a wedge. In-line UPVC handles are straight and can be turned right or left. Cranked handles come in both left and right var