... rods,rings,inserts, shims, wear parts, drawing dies,drilling bits,cold forging dies,bars, balls,burrs ,PCD blades,PCBN blades,ceramic inserts ... of shock resistance than SK6A, used for finishing cast iron, non-ferrous metal and nonmetallic materials, thereby made into tools, wear ... to SK8, used for producing molding dies of metals, non-metallic powder, low-working-load stamping mould and wear-resistant ...