Special Locking and Unlocking Operations---Compared with similar locks on the market, the locking and unlocking of the door lever lock is much smoother and easier for adults to operate. Simple appearance can greatly fit into your home design, reduce the attention of curious babies. Easy to install---Install the door lever lock with 3M VHB tape, no tool or drill required. Adopts viscous and strong 3M VHB tape, no need to worry about adhesive failure. Pls note that the tape effect will be better after 24 hours. 3M VHB tape is easy to remove and no residue on the surface, so no need to worry about door damage. Simple design and wider application ranges---Simple design and Comfort color combinations allow the door lever lock to adapt to the home environment of more customers. Suitable for most types of door lever handles on the market. Why it is necessary---Prevent children or pets from entering specific prohibited rooms. Prevent children from playing with the doors and hurting themselves. Avoid babies or pets from being locked in a room. Important Attention---Pls make sure the arm cannot be pushed up or down when the lock is under the "lock" or "unlock" positions. Accidents can happen at any time in childhood, we hope that children in every family can grow up safely. Our product can be a good helper for parents to better protect children.