WINDOW LOCKS SECURITYPlease check carefully if the size is what you need.Size approx. 1.18 x 0.94 x 0.94 inch, apply to track with more than 0.6 inch heights and less than 0.63 inch thickness. Effectively reduce the risk of children & pets falling from heights, guard against theft. Keep your house safe, limit and fix windows comptiable with ventilation to improve indoor air quality.UPGRADE PROTECTION DESIGNThis window lock is made of solid aluminum alloy, anti-rust and anti-aging. The upgraded vertical window locks design allows the key to be removed and stored properly to prevent toddlers from opening it by mistake. One more layer of protection to eliminate all potential hidden dangers.PROTECTIVE GASKETSEach sliding window locks also comes with a plastic protective gasket to prevent scratches or damage to the window. This locks comptiable with windows with protective gasket can provides enough friction between the lock and the track to ensure that the window will not slide open.EASY TO INSTALLThis adjustable lock comptiable with home is suitable comptiable with both windows and sliding doors. No hole installation saves time and efcomptiable witht. All you need to do is to spin the key through the hole and fix the window stopper on the track. You can easily fix the window lock at any part with the vertical key. No additional installation tools are needed. Easy to reuse and re-install.WHAT YOU GET8 sets of window locks comptiable with sliding windows, including 8 sliding window locks stopper, 8 keys, 8 gaskets and 1 vertical key, can fully meet big family and large house requirement. Note: Heavy doors and windows should be fixed with multiple locks at the same time to improve stability and safety.We check the integrity of the products becomptiable withe shipment, and there may be some minor scratches due to transportation.