1. Material: ABS 2. Installation: non-marking adhesive 3. Rotate to the left to unlock, and vice versa to lock 4. Hidden key rotary switch, baby can not open it 5. Easy to install, the width of the door is at least 2.5 cm 6. Plain color invisible, the baby does not love to play, reject the brilliant colors, reduce attention 7. Refrigerator, drawer, open door and other furniture safety locks, lock the danger, special treatment for curious babies 8. Size: about 5.5 x 5 cm