Good qualityThe automatic door closer adopts aluminum alloy body, die-casting, good sealing, high-quality integrated accessories, wear-resistant and corrosion-resistant, no oil leakage and long service life. Hydraulic bufferThe hydraulic door closer can automatically and quietly close the door, and the swing and lock speed can be adjusted by sections. It can ensure the safety of use, no pinching of hands and more peace of mind. Widely UsedThe groom-gate can be both residential and commercial. It is suitable for all kinds of fire doors, security doors, metal doors, wooden doors, left-opening doors, right-opening doors, and can be installed inside and outside the door. Note: Not applicable to frameless glass doors. Precautions before purchaseOur door closer is suitable for doors with a weight of 35-65 kg and a door width of 70 to 110cm (27.5-44). It is not suitable for doors that are too light or too thin. Door opening range: up to 180. Standard installation method: The door closer is installed on the door about 10 cm from the axis of the door and the side with the speed regulating screw is facing the direction of the door hinge. If you need installation vodeo, please contact seller customer service.