Hight speed combined center drill/counter sinks in both standard 60 degree style and 90 degree style for chamfering a hole to be drilled.
| Size | Point & Shank Size |
| 00 | 0.025 x 1/8 |
| 0 | 0.032 x 1/8 |
| 1 | 3/64 x 1/8 |
| 2 | 5/64 x 3/16 |
| 3 | 7/64 x 1/4 |
| 4 | 1/8 x 5/16 |
| 5 | 3/16 x 7/16 |
| 6 | 7/32 x 1/2 |