PDC cutters Detailed Product Description Size Available:AQ, BQ, BQ3, NQ, ... ):impregnated diamond core bit, surface set diamond core bit, TC core bit, PDC core bit, TSP core bit, electroplated diamond core bit.Impregnated Diamond Core Bit: Impregnation Depth ... " profile, "Semi-round" profile, "Cross" profile...Surface Set Diamond Core Bit:Bit Crown Profiles: "Semi-round" profile, "Step" profile ...