D handles are located to the outside of the window at the bottom of the top sash, screwed into the underside of the sash into the steel reinforcement using four screws. These then enable the top sash to be pulled downwards from the inside (once access is gained by tilting the lower sash inwards). One D-handle is fitted as standard for windows under 1200mm wide and is fitted centrally. Two are fitted as standard on windows 1200mm wide and over spaced equally – max. of 300mm from corners.