Metal zippers are fastening devices made from metal components, typically used in clothing, bags, and other fabric items. They consist of two strips of fabric with interlocking metal teeth and a slider that moves up and down to open or close the zipper. The metal teeth provide durability and strength, making them suitable for heavy-duty applications. These zippers come in various styles, including brass, aluminum, and nickel, each offering different aesthetic and functional qualities. Metal zippers are often preferred for their longevity and resistance to wear, making them a popular choice in fashion and outdoor gear.