Package includes2 window openings, 2 mounting hooks, 4 screws. Our window latches can be inserted directly into your original door handle and can be attached directly without additional mounting screws. Sturdy and durableWindow latch length 10.5 cm, windproof hook Made of high quality stainless steel with white coating to ensure it is rust-proof and durable. Easy InstallationThe window locks are easy to install. Each screw comes with 2 screws, you only need a simple screwdriver to screw it, easy to use, no need a drill to drill. ProtectionAlso suitable as a cat and child safety lock, safety lock system for turning and tilting and turning inward opening windows. Ventilate the room safely and bring in fresh air. Scope of applicationThe PVC window vent for sash or sash windows. Allows windows to be locked open at 4 different opening angles and prevents accidental slamming. Suitable for all common plastic, wooden or metal windows and doors. 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 wind hook 3. Remove the original window handle or install the mounting hook into the door handle before installing the window handle, no need to drill additional screws 4. Mount the original door handle and you're done