Dimensions:Reference picture Use an electric drill to drill a hole on the side of the window, and then tighten the screws with a screwdriver to lock the metal sash lock Window security locks can be used on aluminum, wood, and vinyl windows, suitable for vertical and horizontal sliding windows, single-hung windows, and double-hung windows or doors. They are common locks for homes, public buildings, etc. that require sliding windows Note: Before ordering, please refer to the picture for size and compare with your needs Material: Made from zinc alloy, the window handle is built to last with a smooth surface, rounded edges, and a comfortable grip. window handle Suitable for UPVC, Aluminum Windows, Practical for Your Home Use., Manufacturer: LCUVIMPEX