Features: The use of a spring door hinge can automatically close the door, when the door opens more than 90 degrees, the positioning beads inside the hinge will automatically position on the card slot, keep your door fixed in the open state. Multifunctional designs combines door return, door closer, and door suction, suitable for various applications. Make of Cold rolled steels, Enduring to use indoors and outdoors, suitable for various types of door or cabinets. Removable cores and reinforced shafts allow for easy disassembly and long terms durability. It can be installed behind door, cabinets, shoe cabinets, louvers, ventilation openings, and any other place that require automatic closures, making life convenient. Specifications: Materials: Cold Rolled Steels Color: Silver/Black Color/Gold Length: about 10cm/3.94inch Package Includes: 2Pcs Door Closer Hinge note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.