"Lock" and "Unlock"---Special design of "lock" and "unlock" method. Three buttons will need two hands to lock, and easy operation to unlock by just using one hand (2 fingers). Easy and simple for adults, but hard to use for children. Simple and discreet design that blends in with your room decor. Easy Installation---Install the lock directly by peeling off the 3M VHB adhesive tape and placing the lever lock on the door, no drilling or tools required. 3M VHB adhesive tape with strong viscosity (the effect will be better after 24 hours) and can be removed easily without any residue, without damaging the door. Wide range of applications: Suitable for most types of door handles on the market, it has a wide range of application because it is more convenient and smaller than similar locks on the market. Why need it---No more children or pets locking you or themselves in a room; Prevent children from entering specific rooms such as toilets or warehouses without adult supervision; Prevent children from playing with the door and pinching their fingers. Tips---Permanently unlock the safety lock when your child is not around. Please make sure that under the "lock" and "unlock" position, the arm cannot be pushed up or down. Size: about 7cm lock arm Color: Enamel Gray (Due to the display, there may be color differences) Quantity: 2pcsYeuri (We are Deaf-Mutes if you don't mind, please browse this child safety lock).