Samura Super 5 Nakiri Knife 171Mm / 6.7 Inch: Hand forged with 5 layers steel then hand sharpenned for the utlimate in sharpness and durability.: The Samura SUPER 5 range makes use of 5-layers hard high-carbon steel and is then sharpened by hand. This layering makes the knife extremely sharp and gives the knife an outstanding cutting quality and durability . The five-layer forged steel maintains its cutting performance twice as long as most regular knives. With a blade hardness of HRC 60 and a non slip Mikarata composite handle make the Super 5 range from Samura a pleasure to use.