A metal keychain is a small accessory that can be attached to a key or key ring. Made of high-quality zinc alloy, it is durable, corrosion-resistant, and shiny. Metal keychains can promote businesses by printing or engraving logos, names, slogans, or contact information. They also make great souvenirs, gifts, or personal items and come in various shapes, sizes, colors, and designs to suit different preferences and purposes.