High-Quality ——Automatic Door Closer is made of aluminum alloy, which can prevent rust, wear more abrasion and corrosion resistance, and can last longer. In addition, the material of the craft nylon roller is more smoother and more mute when used. Easy to Install——the Self Closing Door set is equipped with the required accessories for the installation. It only needs to install the base on the door frame, and then install the support rod and pads, no need to modify anything. (Please pay attention to safety when installing) Upgraded Design——Door Closer Shutter is different from ordinary products. It uses dual spring design, so it is more motivated and can be suitable for more types and different weight doors. Adjustable Strength——Automatic Adjustable Closer can adjust its strength, use the regulator for adjustment, adjust 1-4 levels. Adjust along the arrow can increase the elasticity, adjust opposite with the arrow can reduce the elasticity. Adjust to the right force to prevent the door from being damaged. Widely Used——Our door closers for interior door are suitable for metal doors, fire doors, wooden doors, civil doors and commercial doors, almost all doors less than 10kg. Adjustable self closing door is an ideal choice for home, office, hotel room doors.