Stainless Steel Door Spring Hinges Single Action Adjustable Self Closing SpringFeatures: 1. The Materials are durable, rust proof, healthy and environmentally friendly. 2. The surface of the hinge adopts multi layer electroplating process, which is corrosion resistant, wear resistant and durable. 3. When the door is opened to 90 degrees, the positioning bead is stuck, and the positioning can be oriented. 4. Invisible door hinge, 90 degree positioning design automatically closes the door. 5. Easy to care for: The door hinge is