... quality price ratio is high, it mainly is used for cutting and grinding of gray cast iron, chilled iron, nickel-based iron ... PDC cutters for oil/gas drilling and mining bits, PCD/PCBN cutting insert, diamond micron powder and so on.Supreme Superabrasives solid CBN ... characteristic of CBN, they are ideal for cutting tools for the machining of ferrous metal and alloy, all with high productive efficiency ...