Locking and Unlocking --- Special design of locking and unlocking methods. The three buttons require two hands to lock and can be easily operated and unlocked with one hand (2 fingers). Simple and easy to use for adults, but difficult for children to use. Simple and discreet design that blends in perfectly with your room decor. EASY INSTALLATION --- Remove the 3M adhesive tape and place the lever lock on the door to install the lock directly, no drilling or tools required. 3M adhesive tape is highly adhesive (better effectiveness after 24 hours) and can be easily removed without leaving any residue or damaging the door. Wide range of applications: Suitable for most types of door handles on the market, it has a wide range of applications because it is more convenient and smaller than similar locks on the market. Why you need it - No more children or pets locking you in a room; prevents children from entering specific rooms such as toilets or storage areas without adult supervision;