... high speed steel is 63-66HRC. It is specially suitable for cut art paper, copy paper, metal laminated paper, card ... main products as follows:1. printing industry: we supply blades for many paper guillotine cutters, such as polar, Whlenbberg, Perfecta, ... knives, etc.2. woodworking industry: our product line including veneer rotary knives, peeling knives, slicer knives, clipper knives, shear blades, ...