Safety Locks: This sliding window blocker for home and office, you can either keep the windows partially open or closed to avoid any hidden danger that kids and pets might climb on the window. It also keeps burglars out.Wide Application: Window locks designed for horizontal sliding windows, vertical sliding windows and sliding doors like patio doors, sliding glass doors, etc. . Not suitable for plastic window frames.Sturdy Material: Sliding window lock made of aluminum alloy, durable and rustproof, reusable. Comes with protective plastic gaskets to prevent scratches or damage to the window.Size: Before purchasing these window security locks, please make sure your window rail thickness window does not exceed 16 mm; rail height greater than 15 mm. (Note: Not suitable for the rails in the middle of the window).Easy Installation: This window locks with key, quick 3-step installation. No tools or drilling required. Use double hole locks for heavy windows/doors for added security.Size: 24*24*30mmColor: silverQuantity: 1 piece