A chain hoist, also known as a hand chain hoist or manual hoist, is a mechanical device that is used to lift, lower, and move heavy objects. It consists of a chain that is passed through a pulley system, and it is operated using a hand crank or lever. The chain hoist is attached to the object that needs to be moved using a hook or other type of fastener, and it is used to lift and move the object by pulling on the chain.