High Quality Material:It is made of aluminum alloy, chrome plated, anti-rust, sturdy and durable. The bracket is made of chrome plastic, which can avoid the sound of metal friction and has a long service life. Adjustable:Our door closer can adjust the spring tension by adjusting the screw of the door to close it slowly or quickly, so as to better adapt to the actual needs of the door. Easy to assemble:Install the door closer between the door frames, insert the Allen key into the Allen screw hole on the top and rotate it to secure it. According to the weight of the door used, adjust the required resistance in the six adjustment holes. Protective door:The automatic door closer will reduce the resistance when closing the door, protect the door damage and reduce noise, which can provide you with a safe and comfortable life. Widely Used:It is suitable for wooden doors and aluminum alloy doors in homes, offices, fire doors, hotel rooms, interior and exterior spaces.