Multifunctional automatic door closer, automatically close all doors. Very suitable for home use, light office use, shed, ranch, and home office, affordable! Main Features Quick Install Hole-free 3M glue installation, firmness does not damage the wall, easy installation, high-temperature resistance. 50,000 Tests The high-quality P12 steel wire rope has passed 50,000 times of tensile test and rebound test, with strong tensile force. 800G Pull Suitable for doors, or doors with a slightly stronger closing force. Doors that open left and right, wooden and metal doors, residential and commercial doors, exterior/inner door closers, fire doors. Characteristic Anti-oxidation, anti-corrosion, no rust, stable, wear-resistant, weather-proof, hydraulic, quiet, safe shut-off device.