Automatic door closer:You have an automatic door closer, which can effectively prevent you from forgetting to close the door, and the soft nylon rollers can slide quietly and avoid noise disturbance. Adjustable elastic force: The door closer has 4 elastic stoppers, turn in the direction of the arrow to gradually increase the force, suitable for doors between 20-40 kg. Material High Quality:The spring door closer is made of aluminum alloy and stainless steel, one-piece design with galvanizing process makes it very suitable for outdoor conditions, anti-corrosion and anti-rust, durable. WIDELY USED:The door spring can be used by right-handed or left-handed people, the slow and gentle elastic release makes it very suitable for home, garden, office, hotel, dormitory.