LOCKING AND UNLOCKING: Specially designed locking and unlocking system. Locking requires two hands and three buttons, while unlocking is easily done with one hand (two fingers). Simple and intuitive for adults, but difficult for children to operate. Its discreet design blends seamlessly with your decor. EASY INSTALLATION: Install the lock directly by removing the protective film from the 3M VHB adhesive and placing the lever lock on the door. No drilling or tools required. The 3M VHB adhesive provides strong adhesion (optimal after 24 hours) and is easily removed without leaving residue or damaging the door. WIDE RANGE OF APPLICATION: This lock is compatible with most door handles on the market and offers great versatility thanks to its more practical and compact design compared to similar models. WHY USE IT: Prevent children or pets from locking you in a room; Prevent children from entering certain rooms, such as toilets or storage areas, unsupervised. Prevent children from playing with the door and pinching their fingers. TIPS: Always unlock the safety lock when your child is not around. Ensure that the arm cannot be pushed up or down in both locked and unlocked positions.