Package contents: You will receive a door closer with mounting screws and an Allen key. The door closer size is 35 x 185 mm. The bearing capacity is 20-35 kg. Both left and right doors can be used. Material: The door closer is made of quality stainless steel, robust and durable, rust-proof and wear-resistant, high load capacity. Spring operation, automatic closing, safely protects the door and lock. It can be used for a long time. Reduce noise: The automatic door closer reduces the force when the door closes, protecting the door from damage and reducing noise. The tightened lever arm and fixing device can ensure that the door closer is stronger and has the effect of reducing noise. Create a quiet and comfortable environment. Easy to install: The installation of the light spring door closer is very simple, just attach the door closer in the corresponding position with screws. Adjustable spring tension, you can adjust the spring tension by adjusting the door closer screw to make the door close slowly or quickly. Wide range of applications: This automatic door closer is suitable for doors or gates with a slightly stronger closing force. Doors that open left and right, wood and metal doors, residential and commercial doors, door closers for exterior/interior doors, fire doors. It can solve your problem of closing doors in various places.