Yoshihiro Blue Steel Aonamiuchi Yanagi Kiritsuke Japanese Sashimi Sushi Knife 10.5" Ebony Handle with Lacquered Saya Cover KNIFE CAN BE OXIDIZED WITHOUT PROPER CARE* RECOMMEND FOR PROFESSIONAL ONLY* Grade: Aonamiuchi / Knife Type: Yanagi Kiritsuke Steel Type: Aoko (Blue Steel#1) High Carbon / Steel Blade: Single-Edged / Blade Length: 10.5" (270mm) Handle Material: Ebony Handle Hardness Rockwell C scale: 64 / Saya Cover : Included