Yoshihiro Shiroko High Carbon Steel Kurouchi KUJIRA Whale Japanese Utility Chef's Knife, Whale E Type Grade: Black Finish (Kurouchi) Material: Shiroko High-Carbon Steel (White Steel) Hardness Rockwell C scale: 62 Knife Style: Utility Knife Blade: Double-Edged (50/50) /Total Dimension: 6.25 In x 1.5 In x 0.12 In ( Blade Length: 2 In )