Locking and Unlocking – Specially designed locking and unlocking methods. The three buttons require two hands to lock and can be easily operated and unlocked with just one hand (2 fingers). Simple and easy for adults, but difficult for children to use. Simple, discreet design that blends in with your room's décor. Easy Installation---Tear off the 3M VHB tape and place the lever lock on the door to install the lock directly without drilling or using tools. 3M VHB tape has high viscosity (will get better 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 practical and smaller than similar locks on the market.