Door closer?Anti-oxidation, anti-corrosion, rust-free, stable, wear-resistant, weatherproof, hydraulic, quiet, safe stop device. This punch-free automatic sensor door closer adopts no-hole adhesive installation, easy to install, with good firmness and no damage to the wall?high temperature resistance AUTOMATICALLY CLOSE ALL DOORS?Suitable for doors or doors with slightly stronger closing force. Doors that open left and right, wooden and metal doors, residential and commercial doors, exterior / interior door, fire doors.