NQ2 Impregnated Diamond Core Bit
| Size | NQ2 | Design | DCDMA |
| Outer diameter MAX (mm) | 75.44 | Outer diameter MAX (in) | 2.970 |
| Outer diameter MIN (mm) | 75.19 | Outer diameter MIN (in) | 2.960 |
| Inner diameter MAX (mm) | 50.80 | Inner diameter MAX (in) | 2.000 |
| Inner diameter MIN (mm) | 50.55 | Inner diameter MIN (in) | 1.990 |
| Hole diameter (mm) | 75.6 | Hole diameter (in) | 2.98 |
| Core diameter (mm) | 50.7 | Core diameter (in) | 2.0 |
| Hole area (cm2) | 45.0 | Hole area (in2) | 6.96 |
| Core area (cm2) | 20.1 | Core area (in2) | 3.12 |
