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Size BQ™ NQ™ HQ™ PQ™ Core Dia. (in) 1.433 1.875 2.500 3.345 Bit OD STD (in) 2.345 2.965 3.763 4.805 Bit OD RSG (in) 2.360 2.980 3.782 4.827 Bit OD OS (in) N/A 3.032 3.830, 3.895 4.950 Hole Volume (gal/100 ft) 22.7 36.3 58.3 95.1 Metric Measurements Size BQ™ NQ™ HQ™ PQ™ Core Dia. (mm) 36.4 47.6 63.5 85.0 Bit OD (mm) 59.6 75.3 95 ...

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