This 12" leaf-shaped kunai has been carved from a solid piece of American black walnut. Walnut is a beautiful, but lighter and softer American hardwood, with a Janka hardness rating of only 1010. It will not withstand heavy abuse, but has a rich tone and nice feel to it. After a final sanding with 220 grit paper we have coated this with lacquer to give it a nice luster.