Lewis pattern Augers have a cutting spur on one side, a main blade to clear waste on the other, a screw thread in the centre to pull the bit into the cut and a single broad channel to remove the waste. Engineered for use in hand held or stationary machines these augers perform beautifully boring deep holes in softwoods and European hardwoods.
| Auger Size (mm) | Shank Diameter (mm) | Overall Length (mm) | Cutting Length (mm) |
| 6 | 5.5 | 235 | 160 |
| 9 | 8 | 235 | 160 |
| 10 | 9.8 | 235 | 160 |
| 12 | 11.8 | 235 | 160 |
| 16 | 13 | 235 | 160 |
| 18 | 13 | 235 | 160 |
| 20 | 13 | 235 | 160 |
| 22 | 13 | 235 | 160 |
| 24 | 13 | 235 | 160 |
| 26 | 13 | 235 | 160 |
