Yoshihiro Aoko (Blue Steel) Kurouchi Santoku Multipurpose Japanese Chef Knife 7"(180mm) with Saya Cover KNIFE CAN BE OXIDIZED WITHOUT PROPER CARE* RECOMMEND FOR PROFESSIONAL ONLY* Grade : KUROUCHI / Knife Type: Santoku (Multipurpose Chef) Knife / Steel Type: Aoko(Blue Steel #2)High Carbon Steel Blade: Double-Edged (50/50) / Blade Length: 7" (180mm) Handle Material: D-Shaped Shitan Rosewood Handle Hardness Rockwell C scale: 62~63 / Saya: Magonlia wooden Saya