J.A. Henckels's Professional S 7-inch santoku knife with hollow edge, scalloped blade: Full tang, three-rivet construction with patented Henckels blade process, enabling knife edge to stay sharper longer and resharpen more easily. German steel, stainless blade with hollow edge, which allows vegetables and meat to fall off the blade when sliced. Very popular knife for Asian-style cooking, easily slicing various foods very thin. Novodur handles ensure perfect balance, comfort, and durability. The special patented Friodur ice-hardening process results in a strong, no-stain blade. Dishwasher-safe, although J.A. Henckels strongly recommends hand washing knife after every use and resharpening only with a J.A. Henckels sharpening steel. Full warranty.