Security Latches This sliding window blocker for home and office, you can keep the windows open or closed to avoid a hidden risk of children and pets climbing the window. Also, it prevents burglars. . Durable material: stainless steel materials, delicate craftsmanship and superior quality. Our sliding window locks are strong, solid and stable, beautiful workmanship, stainless steel frames that can be used for many times. . Quick installation: installation without punching, card type installation, no punching required, easy to change, repair. No additional tools are required. In each window lock there is an Allen key which holds the track together with the control key. . Wide application High security sliding window lock, tool to instantly lock windows and doors, no drilling or tools required. Easy to remove and reusable. Suitable for most vertical or horizontal sliding doors and many track width sliding doors (adjustable). . NoteSize: 68 x 31 x 16mm. Before buying our security locks, please make sure the thickness of your window rail does not exceed 16mm. The height of the rail is not more than 19 mm. (Note: not suitable for marks in the center of the window). .