Bit diameter | No. × button dia.(mm) | Flushing holes | Weight | ||
mm | inch | Gauge | Front | (Kg) | |
152 | 6 | 8 × Ф18 | 7 × Ф16 | 2 | 22 |
165 | 6 1/2 | 8 × Ф18 | 8 × Ф16 | 2 | 24.5 |
171 | 6 3/4 | 9 × Ф18 | 10 × Ф16 | 3 | 25 |
178 | 7 | 8 × Ф18 | 10 × Ф16 | 2 | 26 |
190 | 7 1/2 | 9 × Ф18 | 10 × Ф16 | 3 | 29 |
203 | 8 | 10 × Ф19 | 13 × Ф19 | 2 | 30 |