The drawstring An American throwing net with a lead chain is a kind of fishing gear that consists of a net bag with a lead chain and a rope with a drawstring. When used, fishermen throw the throwing net with a lead chain into the water and then pull the drawstring to retract the net bag to catch fish in the water. This design can help the cast net sink to the bottom of the water faster and increase the efficiency of capture, which is especially practical when quick response is required or there are obstacles at the bottom of the water.、