Yoshihiro Aoko(Blue Steel) Kurouchi Petty Utility Chef Knife 6 inches(150mm) KNIFE CAN BE OXIDIZED WITHOUT PROPER CARE* RECOMMEND FOR PROFESSIONAL ONLY* Grade : KUROUCHI / Knife Type: Petite / Petty Knife / Steel Type: Aoko(Blue Steel #2)High Carbon Steel(Professional Care Needs) Blade: Double-Edged (50/50) / Blade Length: 6 IN (150mm) Handle Material: D-Shaped Shitan Rosewood Handle Hardness Rockwell C scale: 62~63 / Saya: Lacquered Magonlia wooden Saya