Yoshiharu Carving Knife Set of 5, Yoshiharu Hamono, with Steel-Laminated Blades (Two-Layer Steel) A carving knife known to those in the know as a high-quality product. From a long-established carving knife manufacturer with over 100 years of history. Boasts the No. 1 share in the national market for carving knives for schoolchildren. Skilled craftsmen finish each knife by hand, and their sharpness is first-class. Steel-laminated (two-layer steel) carving knives, as the name suggests, are constructed from two layers of metal. Hard [special steel] is used for the lower layer, and to compensate for the "brittleness" caused by its hardness, a flexible [soft iron] is used for the upper layer. Thanks to the soft iron in the upper layer, it is easy to sharpen, but it is vulnerable to sweat and moisture, so it needs to be cleaned with a dry cloth after use.