Features: Experience the convenience of a self closing door with this Automatic Door Closers, crafted from steel for rusts resistance and durability. This door Closers features adjustable spring tension mechanism, easily fine with the included hexagonal key, ensuring a soft and quiet door Closures each time. Suitable for homeowners, office managers, and hotel maintenance staff look to enhances security and maintain quiet environment by automating their door closing process. Excellent for both indoor and outdoor use, this door Closers is Multifunction for garden gate, room door, and various other setting where a weight ranges of 20-40kg is within the door specifications. The package comes completes with all necessary hardware, making installation a blow for DIY enthusiasts or professional installers seek a reliable door closing solution. Specifications: Material: steel Size: about 9.8x16cm Package Includes: 1 set Automatic Door Closers note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.