Package includes:2 window latches, 2 mounting hooks, 4 screws. Our window locks can be inserted directly into your original door handle and can be fixed directly without additional mounting screws. Robust and durable:Window lock length 10.5 cm, hook windproof Made of high quality stainless steel with white coating to ensure it is rustproof and durable. Protection:Also suitable as a cat and child safety lock, child safety lock system turn and tilt and turn inward opening windows. Ventilate the room safely and bring in fresh air. Easy Installation:Window locks are easy to install. Each screw comes with 2 screws, you only need a simple screwdriver to screw it in, easy to operate, no need a drill to drill. Scope of application:The window remains for sash or sash windows. Locks open windows at 4 different opening angles and prevents accidental slamming. Suitable for all common plastic, wood or metal windows and doors. Specification: Material: Stainless steel Color: White Quantity: 8 Pieces Package includes: 2 x windproof hooks 2 x fixed hooks 4 x screws How to install? 1. Mark the spot with a marker 2. Take a screwdriver and drill the screw into the windproof hook 3. Remove the original window handle or install the mounting hook in the door handle before installing the window handle, no need to drill extra screws 4. Mount the original door handle and you're done