Quick Installation: The automatic door closer uses a non-porous adhesive installation method that easily attaches to any door within 2 minutes without drilling or screws. (Installation and use, use after 24 hours, strong viscosity) 1000g super tensile force: Super 1000g tensile force, the thickened 1.2mm solid steel wire rope is durable after 50,000 times of tensile rebound tests. Avoid the panic of forgetting to close the door and give a sense of safety and peace of mind. Useful device: The door closer effectively connects your door, saving you valuable heating costs and heating the room efficiently. Mosquitoes, flies, cats and dogs enter the room to prevent kitchen fumes from entering the living room. Durable Material: This automatic door closer is made of high-quality ABS plastic and thick stainless steel rope, which is anti-oxidation and corrosion-resistant, stable, wear-resistant and durable. Wide range of applications: You will receive 2 sets of automatic door closers. Our automatic door closers are suitable for most doors, such as living room doors, garden doors, interior doors, house doors, fire doors.