[Features] Ensure Child Safety: The childproof window lock is designed to restrict opening distance of windows and doors to help reduce the risk of injury from falls. Meantime allows fresh air flow. Choose child safety window locks for peace of mind and a saferhome environment. Easy to Install: This window lock not only has strong self adhesive properties but also has screw holes. You can use the included self tapping screws to install in two ways to ensure double safety. With these easy to use locks, your windows are securelyfastened and can only be opened with the key provided, preventing curious children or pets from opening them without adult supervision. [product information] Name:child safety lock Color:white Product material:ABS+steel wire Product Size: 75*32mm Steel wire length=173mm Packing list (you can get after purchasing one item): 5*child safety lock Please understand: 1. Due to the long shipping time, the item may be damaged during the shipping process, if the item is damaged, please leave us a message through the official website immediately before posting comments, and I will solve the problem for you. 2. Due to manual measurement, the size may have an error of 1-3cm. 3. Colors may vary from monitor to monitor.