SAFELON 4 PCS Baby Safety Door Lever Locks， Handle Locks for Childproof & Petproof, Invisible Switch to Prevent Children from Opening The Door, No Screws or Drill

Why it is necessary - prevent children or pets from entering certain prohibited rooms. Prevent children from playing with the doors and hurting themselves. Avoid babies or pets trapping in a room. Larger applications: the door knob lock from Sapelon with the possibility of locking up and down. It has a wider range of applications and is suitable for most types of door handles on the market. Quick installation: install the door lever lock with the 3M VHB tape, without tools or drills. SAFELON uses a highly viscous 3M VHB tape, so you don't have to worry about the failure of the adhesive. Please note that the effect of the tape is better after 24 hours. The 3M VHB tape is easy to remove and has no residue on the surface, so you don't have to worry about damage to the door. Invisible design: the door knob locks from SAFELON use an invisible button design that is difficult for your baby to find and open. Turning to lock or unlock further increases safety. How to use: the invisible switch is hidden under the grey part. Hold down the switch and then turn it to lock or unlock it.