Strong CompatibilityThe window lock adopts 7 x 7mm square, the lock pin length is 124mm, and the screw spacing is 43mm. Suitable for plastic, aluminum and wooden windows opening inwards and outwards as well as slanted windows. Protect your childrenBy locking the windows of the house, provide more protection for children and give parents more security. Anti-theft protection Lock the windows with door locks to make it more difficult for thieves to enter. Aluminum alloy material, a must-have at home. Easy to install The lockable window handle can be rotated 360 degrees and easily installed with the screws provided. Security lockEach window handle is equipped with 2 keys, 8 keys in total. All of our window handles can be opened with a key. All you need to do is take a key with you.