[Strong Compatibility]The lockable window handle adopts a square of 7 x 7mm, the length of the lock pin is 35mm, and the screw spacing is 43mm. Suitable for inward and outward opening plastic, aluminum and wooden windows as well as pitched windows. [Protect Your Children]By locking the windows of , you can offer children more protection and give parents more security. [Anti-theft]Lock the windows with child safety locks to difficult for thieves to get in. Aluminum window lock, a must have . [Easy to Install]The window lock can be rotated and easily installed with the included screws. [Security Lock]Each window lock is equipped with 2 keys, total 16 keys. All of our anti-burglary window handles can be opened with one key,all keys can be shared. Color: White & Silver Material: aluminium alloy Package Contents: 8 x window handles 16 x keys Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.