http://brewwiki.win/wiki/Post:....Double_Glazed_Door_H
Replacement Double Glazing Window Handles When a double glazed window handle breaks, it is important to get a replacement, ensuring safety and functionality. uPVC handles are operated by the spindle, which runs through the centre of the handle, and then into the lock mechanism inside the window frame. The height of the step on a uPVC handle can be determined by examining the screw cap caps that are located on the inside of the handle. Tilt Turn Tilt and turn windows are a common choice in Europe