eSynic Baby Window Retractor*--------: The 6 window latches are made of high quality aluminum, able to withstand greater pressure, provide more safety, health and safety. home and baby/kid safety Easy to lock and unlock* ------: The window opener with special design limitation 7.5" safety cable provides 11-16cm restriction and fresh air in, and the window can be opened fully after removing the cable for one end using the key Easy to install*------: These popular window locks come with self-drilling screws and wrenches and just a screwdriver or drill to install Suitable for all window materials* ------: These window locks for UPVC designs fit most types of windows and small doors, including many types of materials such as PVC, wood, aluminum and aluminum. metal