Wusthof Classic knives are tools of truly outstanding quality. This knife series is certified by the NSF with a seal that proves that these knives are made with the highest standards of hygiene and quality. Since 1814, Wusthof has developed standards for the design and manufacture of precision forged tools. They came as a set, fitted into their own butcher block. The hollow edge contains evenly spaced vertical indentations that create small air pockets between the blade and the food. These small air pockets gently push food off the blade and reduce the friction and drag when slicing. Click here to find out more. Behind the exceptional quality and performance of a Wusthof knife, there is a whole manufacturing process that involves the utilization of the best materials, the design of the knife, and the respect of hygienic norms. © 2020 Wüsthof USA, Inc.