Shimomura-kogyo Tsunouma Petty Knife 125mm (TU-9008) Length: 230mm / length of a blade: 125mm / 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 two percent this through, strengthening black wood flat pattern, this one with ferrule