Features: - Anti-oxidation, anti-corrosion, strong, stable, wear-resistant, weatherproof, small size and space-saving, quiet and safe cutting device. - Durable - Simple and fast installation: non-porous glue installation (install and use, use after 24 hours, stronger stickiness), after the door closer is glued, the stickiness is very strong and will not fall easily. And it can be removed at any time when not in use, without damaging the surface of the object. (It can also be fixed with nails, not including nails) - Function: When studying and working, avoid repeatedly getting up and opening the door to improve the efficiency of study and work; it can prevent mosquitoes and flies from entering the room, and mice will not have the opportunity to enter the room to steal things, which can prevent kitchen fumes from entering the living room, which is effective Isolate the moisture and stale air from the bathroom; when you turn on the air conditioner, the hot and cold air will not leak too much, thus reducing the electricity bill and saving worry and troubleWhat's in the box 1 x Punch Free Automatic Sensor Door Closer