YOSHIHIRO Aoko Blue High Carbon Steel KUROUCHI 2pc SET Japanese Chef Knife (Santoku 7&rdquo; and Petty 6&rdquo;) with Nuri Saya Cover KNIFE CAN BE OXIDIZED WITHOUT PROPER CARE* RECOMMEND FOR PROFESSIONAL ONLY* Grade : KUROUCHI / Knife Type: Santoku, Petty 2PC SET / Steel Type: Aoko (Blue Steel #2) High Carbon Steel (Professional Care Needs) Blade: Double-Edged (50/50) / Blade Length: Santoku 7"(180mm), Petty 6"(160mm) Handle Material: D-Shaped Shitan Rosewood Hardness Rockwell C scale: 62-63 Saya: Nuri Saya Cover Included