Samura Pro-S Utility Knife 145Mm / 5.7 Inch: Japanese Steel with a hardness of 58HRC combined with a European Steel bolster handle: The Samura Pro- S series of Knives combines the best of European style with Japanese quality and excellence. Using AUS-8 steel to give a blade hardness of HRC 58 and a G10 composite material handle for those who prefer European handle design but refuse to compromise on sharpness and durability.