B-76 Impregnated Diamond Core Bit
| Size | B-76 | Design | Metric |
| Outer diameter MAX (mm) | 76.12 | Outer diameter MAX (in) | 2.997 |
| Outer diameter MIN (mm) | 75.87 | Outer diameter MIN (in) | 2.987 |
| Inner diameter MAX (mm) | 61.82 | Inner diameter MAX (in) | 2.434 |
| Inner diameter MIN (mm) | 61.57 | Inner diameter MIN (in) | 2.424 |
| Hole diameter (mm) | 76.5 | Hole diameter (in) | 3.0 |
| Core diameter (mm) | 61.7 | Core diameter (in) | 2.43 |
| Hole area (cm2) | 45.7 | Hole area (in2) | 7.09 |
| Core area (cm2) | 29.9 | Core area (in2) | 4.64 |
