The Longxu Hook, also known as Dragon Beard Hook, was a steel hook about 12 inches long, with a ring for the rope at its base and its two curved serrated blades designed to tangle in an opponent's clothing. With about thirty feet of rope, making it the longest reaching of the chain weapons. It was designed to aid magistrates in capturing fleeing criminals without harming them. Some claimed it was created by a Doji Magistrate, inspired by investigations into ninja activity.