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OEM Two Flute Sprial Compression Graver Micro - Grain Solid Carbide CNC Carbide Bits Micro - Grain Solid Carbide two Flute Sprial Compression Graver for cutting wood, Laminate,artificial stone, plastic Description: Bits are made of micro-grain solid carbide, Produced by Walter CNC grinding machines. This series of tools are of high processing efficiency, good abrasion resisitance, stable dimensional accurancy, high interchangeablility as well as long service life. Therefore,