This item is a door closer, weight about 30kg. Made by material, . Easily installed, don't need to broken the door, floor or wall, just need an screwdriver and screws. Suitable for most kind of home use door and indoor door. Features - Color: Silver. - Material: Aluminum. - Size: About 18 x 4 x 0.3cm. - Made by light weight aluminum material and strong power spring, perfect fit with your door. - Easy to install with your home use door, only few screws(Included). - Adjustable design allow you choice the best required thrust to open or close a door. - 30 kilogram max weight for the door, fit for most kind of wood door and indoor door. Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1 Closer 1 x Hexagon Wrench 1 x Screw Kit