HQ3 Impregnated Diamond Core Bit
| Size | HQ3 | Design | DCDMA |
| Outer diameter MAX (mm) | 95.76 | Outer diameter MAX (in) | 3.770 |
| Outer diameter MIN (mm) | 95.38 | Outer diameter MIN (in) | 3.755 |
| Inner diameter MAX (mm) | 61.24 | Inner diameter MAX (in) | 2.411 |
| Inner diameter MIN (mm) | 60.99 | Inner diameter MIN (in) | 2.401 |
| Hole diameter (mm) | 96.1 | Hole diameter (in) | 3.78 |
| Core diameter (mm) | 61.1 | Core diameter (in) | 2.41 |
| Hole area (cm2) | 72.8 | Hole area (in2) | 11.29 |
| Core area (cm2) | 29.3 | Core area (in2) | 4.5 |
Flat W matrix
