Ball chain is chain with round beads or metal balls that are fixed along the chain. It is commonly used in dog tag style necklaces and key chains. It can also be used as a base for large-hole jewelry. This chain is commonly used or finished with ball chain connectors at the ends. The distance between the beads varies between different styles of chain. Some people use the terms “ball”, “beaded”, or “bead” chain interchangeably and mean the same type of chain.