Heavy duty trouble free operation. Combined cladded steel of tough unalloyed carrier inlaid with high tungsten tool steel edge. Finely honed edges with no teething & chipping problems. Long intervals between resharpenings. Sizes available compatible with most popular machines such as Perfecta, Polar, Maxima, Mandelli, Schnieder, Wohlenberg, challange, Itoh, Goodhale, F.L etc.