Dragon beard hook
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The Chinese dragon beard hook (also known as the Longxu hook) is a thrown entangling/trapping concealable weapon.[1] It features a two pronged steel hook about 33 cm (13 in) long. An iron ring on a crescent-shaped body allows a rope to be attached. The hooks consist of two spearheads with serrated ends, 20 cm (8 in) apart. The rope, about 10 m (30 ft) long, can be tied to the user's wrist.[2] This allowed the user to snag and reel in an adversary, which made the weapon very popular amongst constables in bygone days.[citation needed]

Training to use the weapon is much like learning to use a rope dart. The weapon hails from Song dynasty.