Kakute are rings made of iron or steel that were sometimes worn by the ninja, and favored by the kunoichi, having one to four metal spikes protruding from it. The spikes were sometimes dipped in poison. Kakute were usually worn on the middle finger with the spikes hidden inside the hand, and then used to attack when the enemy least expected. The s...
Found on
http://en.wikipedia.org/wiki/Kakute
The Kakute were rings that the kunoichi wore that were dipped in poison. The rings could be made out of metals, and tempered wood. The ninja would quietly strangle enemies with the ring stuck in their neck. It was far less messy then using a sword, and left very little evidence on how the victim died.
Found on
http://www.swordsknivesanddaggers.com/ninja-weapons-glossary.html
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