This planet combines the sharpness of carbon steel and the durability of special steel. Forged from extra thick wood, Hagane pops out impurities and becomes very sticky Recommended for a well-balanced "Honmaomon" that will last a long time. Coniferous trees, especially cedar and cypress have outstanding sharpness and a different shaved taste and gloss. 　 Special steel carbon steel with Cr (chromium) and W (Tungsten) are added to the carbon steel for a long lasting finish with improved heat treatment properties, abrasion resistance, and durability. By selecting steel that suits your applications, from medium hardwood, to soft wood or suitable for hardwoods, the efficiency of work is greatly increased. The special steel classification is divided by the amount of C and W and comes in a variety of types. Even with the same ingredient, there may be differences in sharpness and sharpening depending on the size of the crystal. In addition, each steel has flat steel that can be forged and stretched with double or half-sided steel that can be used as is. By strengthening even the same steel, the impurities can be removed and increases the stickiness, and the slight cutting differences.