Safety: The window handle can be used as a child safety/anti-theft device - Offers greater protection for the child and greater safety for parents - Suitable for inward and outward opening plastic, aluminum, and wooden windows, as well as tilt-and-turn windows. 【Multiple Opening Methods】 The window can be positioned in 3 states with the handles: closed, open, and tilted. The handles can be locked with a key when closed or tilted. Two keys with the same key are available for each accessory. Easy and Convenient Installation: Each lockable window handle comes 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. Anti-Burglary Protection: The window protector makes it more difficult for thieves to break in thanks to the locking mechanism. For example, the French window can be rotated by drilling from the outside, thus ensuring better burglary protection. Included: Each aluminum window handle contains a