Tekagi-shuko

Wikipedia:Tekagi-shuko|Tekagi-shuko]], (手かぎ手虎 lit. "Tiger hook hands"), otherwise known as "Neko-te" (猫手; lit. "Cat hands"), were two of the many kakushi buki (隠し武器 lit. "hidden weapon"?) deployed by the ninja of Japan.

Trivia

 * In the 2012 series, in Splinter's flashbacks, The Shredder is seen weilding a pair of "Tekagi-shuko/Tekko-kagi", (lit. Tiger hook hands". In the present, he is seen with custom-made Tekko-kagi claw weapons: They have extendable blades and are razor sharp. They have also been shown to be strong enough to cut through metal shipping containers.
 * In the Marvel Comics franchise, the Tekagi-shuko are the inspiration for the retractable claws of one the franchise's leading characters, Wolverine/Logan.