【Rust-proof and durable】 The automatic spring door closer is made of stainless steel and zinc alloy. The use of one-piece molding process and electroplating process makes the whole product durable, rust-free and long service life. 【Reduce the intensity and noise of closing the door】 Automatic door closer It can reduce the intensity when closing the door to protect the door from damage. It also reduces noise interference when the door is closed, with adjustable tension and adjustable screws for slow or fast closing, creating a quiet and comfortable environment for you. 【Adjustable Design】 Our internal door closer adopts an adjustable design. You can use the included adjustment rod to insert the rotating hole and adjust the closing force as needed to increase the convenience of closing the door. 【Easy to Install】 This spring door closer is easy to install, both left and right doors can be installed. Threaded connection, convenient assembly and disassembly, durable and smooth use,