Hunan O.E.D Co., Ltd (O.E.D), established in 1988, We are specialized in manufacturing ductile iron, carbon steel, alloy steel.. Hardness ... /M2 Coating:DLC coating Workpiece:Reflectal&Birmasil We specialize in the manufacture of tungsten carbide products such as tungsten ... blades,PCBN blades,ceramic inserts, and customized products etc.In the meantime ,please be informrd any grade and performance are ...