Shimomura-kogyo Tsunouma Gyutou Chef Knife 180mm (TU-9003) Length: 305mm / Blade length: 180mm / Thickness: 2.0mm Blade material: stainless steel superalloy / molybdenum-vanadium steel Cutting edge hardness: HRC57 plus or minus 2 Pattern charge: stop tack and tack back three percent this through, strengthening black wood flat pattern, this one with ferrule