Yoshihiro Nashiji High Carbon White Steel #2 Sujihiki Japanese Slicer Knife (9.5''/240mm) Grade: Black-Forged (Kurouchi) / Knife Type: Sujihiki (Slicer Knife) Steel Type: White Steel #2 (High Carbon Steel, will rust and oxidize if not properly maintained) Blade: Double-Edged (50/50) / Blade Length: Available in 9.5(240mm), 10.5''(270mm) Handle Material: Handcrafted Chestnut Wood Handle Hardness Rockwell C scale: 63-64