Material: Aluminum alloy chrome steel. Size: about 7 * 6.5 * 1.6 inches. Suitable for left or right hand doors, Suitable for door weight 35 kg, door width 100 cm, maximum door opening angle 175 . The closing force of our door closer can be adjusted by an attached hex wrench, tighter or looser according to your personal needs. This internal door closer can work well with many types of door. It is suitable for installation on the wooden or aluminum alloy door frame in home, office, hotel, apartment, dormitory, etc. The package contains 1 door closer, 5 screws and 1 hex wrench. The matching metal screws for easy installation and the hex wrench to adjust the force. Specifications Material: Aluminum alloy Size: 7 * 6.5 * 1.6 inches Maximum door opening angle: 175 Door weight: 35 kg Door width: 100cm Package Included: 1 Automatic Door Closer 5 Screws 1 Bracket Scope of application This product is suitable for home, hotel room doors, office, indoor, wooden doors, aluminum alloy door use. How to install 1. find the adjusting bolt 2. remove the bolt from the hole 3. use a wrench to adjust the bolt 4. fix the bolt after finishing the adjustment Kindly Tips Not suitable for children under 3 years old. Please read the size correctly before purchasing.becomeveryrich