These Cold SteelA(R) Throwing Spikes are made in the style of the ancient "bo-shuriken" used by the ninja assassins of ancient Japan as they plied their lethal trade. Also known as throwing darts or throwing needles. Small. Easily concealable. Exceptionally sharp. Each Spike can, with practice, be accurately thrown with significant force into any unassuming piece of cardboard, styrofoam, wood, or similar. 420 stainless steel Black-oxide coating (2) 2.5" blades, 5" overall (2) 3.5" blades, 8" overall Includes nylon pouch for storage