High quality materials: door window lock is made of iron + zinc alloy and rubber, which is durable, safe and healthy. You don't need to worry about its service life. Our window locks also improve the shortcomings of other window locks that are not fixed and not suitable for the middle track. Easy to install: our window locks are easy to install. Before installing the window stop, just clean the area of the lock and close or open the window; Insert the outrigger firmly into the window slot and turn the knob clockwise until the product is fixed. Good safety performance: our door and window locks can effectively reduce the risk of children and pets falling from high windows. By locking the windows, it can also protect your property from rainstorms and hurricanes, or prevent theft and property damage during your travel. Widely used: our door and window locks can be used on most wood, glass, plastic and metal surfaces. You can provide child protection for sliding doors and windows of your terrace, wardrobe, shower, storage room and entertainment center.