Chain

A chain is a series of connected links which are typically made of metal. A chain may consist of two or more links. Chains are usually made in one of two styles, according to their intended use: Those designed for lifting, such as when used with a hoist; for pulling; or for securing, such as with a bicycle lock, have links that are torus shaped, which make the chain flexible in two dimensions (The fixed third dimension being a chain’s length.