【Safety】The window handle can be used as a child lock/anti-theft device, by locking the window in the house, it provides more protection for the child and gives more security to the parents. It is suitable for inward and outward opening plastic, aluminum and wooden windows and sloping windows. 【Installation Size】The distance between the screw holes of the handle is 43mm, the width of the main shaft is 7*7mm and the length of the square shaft: 35mm; These window handles are manufactured to industry standard dimensions, so you can rest assured that this handle will fit most Espag and Shoot-Bolt systems currently available. 【Easy Installation】Each window handle is equipped with 2 screws and 2 keys for easy installation, lockable to almost any window and installs quickly and easily in 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 when closed or tilted. 【Safety Lock】Simple and safe