Features: Premium steel spring hinges offer Double action auto close functionality with adjustable speed control, perfect for smooth bidirectional door operation in high transport areas. Corrosion resistant brushed steel construction and integrated key adjustable closures ensures strong Performances across various door materials. Ideal for commercial property managers, homeowners, and architects requiring reliable auto closing solution for barn door , retail entries, or office partitions. designs for Multifunction indoor/outdoor applications including restaurants, warehouse , and hallway door where controlled automatic closing enhances safety and convenience. Complete installation includes 2 auto aligning hinges, 16 screws, and adjustment tool to simple retrofitting existing door with industrial spring mechanisms. Specifications: Material: steel Size: multiple for option Package Includes: 2pcs Door Hinges note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.