Safety Locks: This sliding window stopper for home and office, you can keep the windows open or closed to avoid a hidden risk of children and pets climbing the window. Also, it prevents burglars. .These universal latches are designed to fit most hinged or sliding doors and windows. They are used to lock the window or limit the window. .Sturdy Material: Aluminum alloy sliding window lock, durable and rustproof, reusable. Comes with plastic gaskets to prevent scratches or damage to the glass. .Hardened steel bolt offers snap lock in firm or vent position, 2 brackets for narrow fenders and full size fenders. Recommended for wooden wing windows. .Easy Installation: This window locks with a key and a quick 3-step installation. No tools or drilling required. Use double-hole locks in windows or heavy doors for added security. .