Yoshihiro Aoko Blue Steel#1 Suminagashi Yanagi Kiritsuke (Sword) Japanese Sushi Sashimi Chef&rsquo;s Knife with Ebony Handle (11.8", 300mm) KNIFE CAN BE OXIDIZED WITHOUT PROPER CARE* RECOMMEND FOR PROFESSIONAL ONLY* Grade: Suminagashi Damascus / Knife Type: Yanagi Kiritsuke Steel Type: Aoko Blue Steel #1 High Carbon Steel / Blade: Single-Edged Bolster: Water Buffalo Horn (BOLSTER COLOR -VARIES) / Handle Material: Octagonal Ebony Hardness Rockwell C scale: 64-65 / Saya Cover : Lacquered Saya Cover