Yoshihiro Aoko Blue High Carbon Steel Hongasumi Kenmuki Japanese Vegetable Utility Chef Knife 7 Inch(180mm) Grade: Hongasumi / Knife Type: Kenmuki (Vegetable Chef)Knife Steel Type: Aoko (Blue Steel#2) High Carbon Steel Blade: Single-Edged/ Blade Length: 7inch (180mm) BOLSTER: Water Buffalo Horn (BOLSTER COLOR -VARIES) / Handle Material: Octagonal Magnolia Hardness Rockwell C scale: 63-64 / Saya Cover : Included