Multifunctional design combined with door return, door close, door suction, suitable for a variety of applications Made of cold rolled steel, durable for indoor and outdoor use, suitable for various types of doors and cabinets You can install it behind the door, cabinet, shoe cabinet, louver, air vent or anywhere you need automatic opening, make your life more comfortable Removable core and reinforced shaft allow for easy disassembly and long term durability With spring door hinge, when the door is opened more than 90 degrees, the positioning beads inside the hinge are automatically placed on the card slot and locked in the open position, Manufacturer: Rxgiasup