Special drills -grinded-
-extra short flute, break-proof
| Part No. | D | B | A |
|---|---|---|---|
| JT306180050 | 180 | 30 | 5.0 |
| JT306180055 | 180 | 30 | 5.5 |
| JT306180060 | 180 | 30 | 6.0 |
| JT306180065 | 180 | 30 | 6.5 |
| JT306180070 | 180 | 30 | 7.0 |
| JT306180075 | 180 | 30 | 7.5 |
| JT306180085 | 180 | 30 | 8.5 |
| JT306180090 | 180 | 30 | 9.0 |
| JT306180105 | 180 | 30 | 10.5 |
