The key chain usually attach to the key. People grabs his key on the way out to door, he will see your key chain and think about your business. Give your customer a keepsale, they will use every day. Key chain are a unique to remind them of their great experience with your company. The key chain can be matal key chain, soft pvc key chain, and silicone key chain. They may be availabe with various custom attachment like ball and chain, split ring or key ring, phone charm.