... represent the ultimate in core drilling performance. BQ HQ NQ Mineral Exploration PDC Core Drill Bit Many years ... LTK60, TBW3. N-Gauge Core Bits: NQ, NQ-3.032, NQ2, NQ2-RSG, NQ3/NQTT, NQ3-RSG, NQ3 ... -3.032, NMLC, NWG(NX), NWM, NWT, TNW4. H-Gauge Core Bits: NQ, HQ-RSG, HQ-3.830, HQ-3.895, HQ3 ... /HQTT, HQ3-RSG, HQ3-3.380, HQ3-3.895, HMLC, HWF-Long ...