This series of chains are all made of copper. Their styles are very similar, and their designs are relatively simple. They are the conventional styles we often use. Their styles and designs are similar, but the sizes and colors are different, which makes them unique. Although this series of chains is a simple style, their use on the bag will make the bag more advanced. We can also customize the chain they want according to the needs of customers, welcome to contact us to get more information about products.