The hook sword, twin hooks, fu tao, hu tou gou (tiger head hook) or shuang gou (simplified Chinese: 钩; traditional Chinese: 鈎 or 鉤; pinyin: Gou) is a Chinese weapon traditionally associated with northern styles of Chinese martial arts and Wushu weapons routines, but now often practiced by southern styles as well.
Reliable information on hook swords is difficult to come by. While sometimes called an ancient weapon and described as dating from the Song dynasty to Warring States or even earlier, most antique examples and artistic depictions are from the late Qing era or later, suggesting that they are actually a comparatively recent design. They were also an exclusively civilian weapon, appearing in none of the official listings of Chinese armaments. Surviving sharpened examples point to actual use as weapons, but their rarity, and the training necessary to use them, strongly suggest that they were only rarely used as such.
Also known as "tiger hook swords" or qian kun ri yue dao (literally "Heaven and Earth, Sun and Moon sword"), these weapons have a sharp blade similar to the jian, though possibly thicker or sometimes unsharpened, with a prong or hook (similar to a shepherd's crook) near the tip. Guards are substantial, in the style of butterfly swords. Often used in pairs, the hooks of the weapons may be used to trap or deflect other weapons.
There are five components to the hook sword:
Routines for hook swords are taught in such northern schools as Northern Shaolin and Seven-Star Mantis, and in some schools of southern arts such as Choy Lay Fut. Modern routines for hook swords are often very flashy, and may involve techniques such as linking paired weapons and wielding them as a single long, flexible weapon. Most routines are single person. Some schools of Baguazhang also teach a similar weapon, often called "deer horn knives" or "Mandarin duck knives." These weapons typically feature a much shorter or entirely missing main hook, and instead focus on the various cutting and stabbing blades arranged around the guard. Because of the various protrusions and the high possibility for accidental hooking or stabbing, they are almost never used in sparring, and are used sparingly in two person routines
In the movie One-Armed Swordsman, a modified version of the hook sword is used.
Kabal from the video game series Mortal Kombat wields a pair of hook swords. They were packaged with Liu Kang, Scorpion, Jade, and Shao Kahn 6-inch figures, as generic weapons in the toyline made by Toy Island.
In Avatar: The Last Airbender, Jet wields a pair of hook swords.
In the video game For Honor, Nuxia wields a pair of hook swords.
In the video game Path of Exile, the weapon can be wielded by the player and it exists under the name of "Tiger Hook".