Small size and wide range of applications --- smaller than similar door locks on the market, so they are suitable for most door handles and a wide range of applications on the market. "Lock" and "Unlock" --- "Lock" and "Unlock" methods specially designed. The three buttons require two hands to lock, but only one hand (two fingers) can be easily unlocked, which is easy for adults without children. > Easy to install, just tear the 3mVHB ribbon and place the lever lock on the door to install the lock directly, without drills or tools. why do you need it? No more children or pets will enclose you or will be locked in the room; Prevent children from entering parts without the supervision of an adult, such as toilets or warehouses; Prevent children from playing with doors and dogs. WARNING --- If there are no nearby children, please "unlock" the security lock. Make sure in the "locked" and "unlocked" positions, the robot arm can not push down.Delivery: 2 Anti-theft handle locksJust tear the 3mVHB ribbon and place the lever lock on the door to install the lock directly, without tool drill.The strong adhesion of 3MVHBAUNE ribbon (the best effect after 24 hours) can be easily removed without leaving residue and disgust on the door.1: 1.18 inches / 3 cm2: 12.5 cm3: 3.5 cm / 1.38 inches4: 0.79 inches / 2 cm5: 3.5 cm / 1.38 inchesSuitable for most door handles, with a wide range of applications.Prevent children from Enter certain rooms, such as toilets or warehouses, without the monitoring of an adult; Do not let the kids play or pinch the door with your fingers.