Made of heavy-duty stainless steel, precision-made, high strength, not easy to rust. Door hinges with anti-rust treated surface for excellent corrosion resistance, firmness and durability Quiet: Under the action of the lubricated ball bearing, no noise will be produced when opening or closing the door Ball bearing hinges have always been very popular for their smooth operation. Suitable for standard residential interior doors, a pair of hinges is adequate Applications: The hinges with 8 mounting holes can be firmly installed on the door, can also be used for cabinets, doors, windows, wardrobes, toolboxes, etc.