Security: The window handle can be used as a child safety / anti-theft device - Provides more protection for the child and gives parents more security - Suitable for inward and outward opening plastic, aluminum and wooden windows as well as tilted windows. 【Different Opening Methods】 The window can be located in 3 states with the handles: closed, open, tilted. The handles can be locked with a key when closed or tilted. There are two keys with the same key for each fitting. Easy and convenient installation: Each lockable window handle is equipped with 4 universal window handles, 8 screws and 8 keys for easy installation, and can be mounted quickly and easily in just a few steps. Burglar protection: The window protection makes it more difficult for burglars to break in thanks to the locking mechanism. For example, the balcony door can be turned by drilling from the outside, thus providing better burglar protection. Scope of delivery: Each aluminum window handle contains a handle, two