1. durability This automatic door closer is made of commercial-grade aluminum alloy and is hydraulically driven. It can achieve full automatic closing with adjustable speed, bringing you a convenient and safe life and protecting your door and locks. 2. Safety This door closer helps ensure the safety of you and your family. It can automatically close the front door, preventing thieves from entering. This spring door closer can give you more peace of mind, especially when there is frequent traffic in your residence. 3. Silent Operation This spring door closer can reduce the noise interference generated when closing the door. It closes the door slowly, reducing the damage to the door caused by violent impacts and also preventing you from forgetting to close the door. 4. Suitable Door Types Our indoor door closers are suitable for metal doors, fire doors, wooden doors, civilian doors, and commercial doors, etc. They are almost suitable for all doors weighing less than 10 kilograms. The adjustable automatic door closer is an ideal choice for homes, offices, and hotel guest room doors. 5. Easy Installation This door spring closer is equipped with all the screws and fixing devices required for installation. The automatic door closer also comes with installation instructions to ensure that the hydraulic door closer can be easily and efficiently installed on your door.