【Safety】The window handle can be used as a child safety lock/anti-theft device. By locking the window in the house, it provides more protection for the child and more safety for the parents. It is suitable for indoor use and outward-opening plastic, aluminum and wooden windows as well as sloped windows. 【Installation size】The distance between the screw holes of the handle is 43mm, the main shaft width is 7*7mm, and the square shaft length: 35mm; These window handles are manufactured to industry standard dimensions so you can be sure that this handle will fit most Espag and Shoot Bolt systems currently available. 【Easy Installation】 Each window handle is equipped with 2 screws 2 keys for easy installation, lockable to almost any window and installed quickly and easily with just a few simple steps. 【Various Opening Methods】 The window can be in 3 states with the handles: closed, open, tilted. The handles can be locked with a key in the closed or tilted state. 【Safety Lock】 Simple and