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