These knives are crafted using two premium types of steel. SKD11, a high-carbon, high-chromium alloy tool steel, is prized for its exceptional wear resistance and toughness, making it ideal for demanding kitchen tasks. White Steel #2 (Shirogami #2) is a traditional Japanese carbon steel, favored for its ability to achieve an extremely sharp edge while being easy to sharpen. Typically, SKD11 knives are hardened to a Rockwell Hardness (HRC) of 60–62, balancing hardness and toughness, while White Steel #2 blades are hardened to HRC 61–63, offering outstanding edge retention and sharpness.