Tetsuboku is a very hard exotic wood found only in Japan. The name, "Tetsuboku" is literally translated as an iron wood to describe the hardness of the wood, however, the each tissue does not cling so tightly, it is NOT recommended ofr the full contact training. 100% Tetsuboku wood. All handmade. 101.5 cm. Chevroned spine. Made in Japan.The actual color or the wood grain may differ from the image due to the nature of product.