Keychains, also known as lock key chains, key rings, key chains, key hanging, etc. The materials for making keychains are usually metal, leather, plastic, wood, etc. This item is delicate and small, with a variety of shapes, and is a daily accessory carried by people every day. Keychains are a kind of decoration hung on the key ring. Choosing a key chain that matches your favorite key can not only reflect your mood and personality, but also show your taste and bring yourself a happy mood. Keychains have a variety of shapes, such as cartoon shapes, brand shapes, simulation models, etc. The materials are generally such as copper, aluminum, rubber, plastic, etc. Now it is mainly zinc alloy coated with nickel or rhodium to prevent rust. Keychains have now become a small gift for gift-giving.