thinKitchen Presents Richardson Sheffield | A unique fusion of Japanese style and Western innovation. Kyu is a fluid and organic shape, which echoes the traditional Japanese bow. Bringing together the finest quality materials, 21st Century technology and the cool Japanese aesthetics. Premium quality Chrome Molybdenum Vanadium high carbon stainless steel blade. Fine taper ground blade for effortless precision cutting. Superior Rockwell hardness rating of HRC 58.