neko-te 猫手 Translated: Cat hands is another name for the Tekagi-shuko
This weapon/tactical tool was created and utilized by the deadly ninja's of Japan
Training at the secretive ninjutsu schools included scaling large wooden walls with the cat claws and a special variation attached to the feet
Many ninja warriors have claimed lethal one hit fatalities by using the Tekagi shuko to deliver one lethal blow to a major artery.
a Togakure Ryu Ninjutsu Shuko Training session video below gave me quite a laugh, mainly because of the dramatic musiv involved. But it is a good demonstration non the less