Lift hooks are located to the inside of the window at the bottom of the lower sash and placed 19mm up from bottom of sash. Screw through the sash into the steel reinforcement using two screws, these then enable the lower sash to be pulled upwards. One lift hook is fitted as standard for windows under 900mm wide – the lift hook is fitted centrally. Two lift hooks are fitted as standard on windows 900mm wide and over; these are spaced equally and max. 300mm from corners.