FeaturesWith high strength aluminum housing and steel encased hardware, it is wear resistant and durable, not easy to rust, smooth operation, complete accessories for easy installation.Designed for medium to high traffic entrances, such as homes, store, restaurants and other light commercial areas, ensures smooth door closing while preventing slamming.The telescopic arm can be freely adjusted and retracted even if the door frame and door leaf are not in the same plane (within 5cm/2").The arm can swing from 15 degrees to a full 180 degrees and has an adjustable closing speed from 0 to 15 degrees, allowing you to adjust the opening force and closing speed of your door.For residential doors, wood doors, fire doors, smoke doors, building doors, access doors, fire and stainless steel doors. Applicable door weight 35-65KG, door width 70-110cm/27.56-43.31in. SpecificationsMaterial: Aluminium alloyDoor closing speed: Adjustable from 0° - 15°.Door closing speed: Adjustable between 15° and 180Way of positioning: The opening angle of the door closes automatically within 180°.Applicable door weight: 35-65kgApplicable door width: Approx. 70-110cm/27.56-43.31inScope of application: Fire doors, thickened stainless steel doors, etc.