What Does It Take To Make The World's Best Kitchen Knife? A single-minded dedication to perfection and performance...qualities epitomized by the Chef'sChoice name. Our Trizor cutlery is in a class by itself. Its secret is the unique Trizor steel, which has higher tensile strength and hardness than conventional cutlery. Measured at Rockwell 60 on the hardness scale (compared to 55 for other leading brands),it is the key to our cutlery's sharper edges and superior edge retention. Trizor knives stay sharper up to 10 times longer than other U.S. or German cutlery. Chef'sChoice Trizor Professional 10X cutlery is fully forged and hand-crafted in the U.S.A. The chef's knife bolster is uniquely tapered, allowing sharpening of the full blade so that it maintains its optimum shape for the life of the knife. The textured polymer handle on every Trizor knife is seamlessly formed onto the full-length tang, eliminating bacterial contamination and ensuring a superb feel and non-slip grip, wet or dry..