Adjustable Window Restrictor: You no longer have to worry about the difficulty of controlling the opening distance. You can adjust the length of the chain to determine the size of the gap for adequate ventilation while keeping your baby and cats safe inside. The gap size can vary from 3.5 cm to 19 cm. Refrigerator Lock with Keys: The package includes: 2 x black window lock, 2 x keys, some screws and 1 x spare adhesive pad. It is an ideal choice for keeping your children and pets safe. Two Installation Methods: These window restrictor locks come with strong adhesives and screws. Simply clean the surface, remove the adhesive film and stick it on the window frame. You can use the included screws and adhesives for two-method installation at the same time to ensure double security. 360 degree rotation design can meet any directional requirements, more flexible.