Made of heavy duty stainless steel, precision crafted, high strength, not easy to rust. Door hinges with rust-proof surface treatment 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.