Strong Compatibility The window lock adopts a 7 x 7 mm square, the length of the locking pin is 32 mm and the screw spacing is 43 mm. Suitable for inward-opening and outward-opening plastic, aluminium and wooden windows as well as slanted windows. Protect your children. By locking the windows in the house, provide more protection to children and give more security to parents. Theft Protection Lock windows with locks to make it more difficult for thieves to enter. Aluminium alloy materialA must-have in your home. home. Easy to clean; installThe lockable window handle can be rotated 360 degrees and easily installed with the included screws. Security LockEach window handle comes with 4 keys, 4 keys in total. All our window handles can be opened with one key. All you have to do is take a key with you.