Yoshihiro Mizu Yaki Aogami Super Blue High Carbon Kurouchi Sujihiki Slicer Chef knife with Rosewood (9.5 IN) Grade: Aogami Super Kurouchi / Knife Type: Sujihiki (Slicer Sushi Sashimi )Knife Steel Type: Aoko Super Blue High Carbon Steel (Not Stainless) Blade: Double-Edged (50/50) / Blade Length 9.5(240mm) BOLSTER: Double Ebony wood / Handle Material: Shitan Rosewood Handle Hardness Rockwell C scale: 64-65 / Saya: Not Included