Kunai (Ninja multi-purpose knife) This is a tool shaped like a double-edged knife with rings around the bottom of the handle. It was an all-purpose ninja tool that could be wielded in a swinging or stabbing motion as a weapon, or could be used for tasks such as digging holes or whittling down wood. Shikoro This is a similar shape to the kunai, but it has a serrated saw-like blade which could be used to cut down trees and bamboo. It was also used to widen small holes created by a drill, thus making larger holes which the ninja himself could pass through.
