Hinges are common door hardware in daily life. We usually see that the door will automatically reset slowly after opening. What we see is the "automatic closing" situation. In fact, the door uses a lift-off hinge. With hardware, the lift-off hinge is mainly used to open the door. When the door is opened, the door will automatically rise for a certain distance. When the door is closed, due to the weight of the door, the door will automatically fall and reset, which forms the phenomenon of "automatic door closing". Refer to the RDH-06 stainless steel lift-off hinge of Reliance Hardware, the hinge can reach a thickness of 3mm, which is silent and free of jams when opening and closing, which is practical and beautiful.