Concept of weapons (Shuriken)

A shuriken also known as sword hidden in user's hand is a traditional Japanese concealed weapon that was generally used for throwing, and sometimes stabbing or slashing. BO- shuriken are throwing weapons consisting of a straight iron or steel spike, usually four-sided but sometimes round or octagonal in section. Some examples have points on both ends. The length of bo-shuriken ranges from 12 to 21 cm (5–81⁄2 in) and the average weight from 35 to 150grams (1.2–5.4 ounces).[3] They should not confused with the kunai, which is a thrusting and stabbing implement that is sometimes thrown.