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Cobra Carbide chucking reamers for use in general purpose reaming applications. Made of micro grain solid carbide. Spiral fluted reamers provide improved chip evacuation and freer cutting action for enhanced productivity and better workpiece finishes. General purpose reaming in all materials including steel and alloys up to RC40, stainless, aluminum, brass, bronze and plastics. Excellent work on carbon steel, alloy steel, hardened steel, stainless steel, cast iron, and good work on aluminum alloy, nickel/inconel alloy, titanium materials. H7 Reamer diameter tolerance. H6 Shank tolerance.