| 820711 | 820711 - Rock drilling, boring heads of sintered metal, carbid |
| 820712 | 820712 - Rock drilling or earth boring tools except carbide |
| 820713 | 820713 - Tools, interchangeable; rock drilling or earth boring tools, |
| 820719 | 820719 - Tools, interchangeable; rock drilling or earth boring tools, |
| 820720 | 820720 - Tools, interchangeable; (for machine or hand tools, whether o |
| 820730 | 820730 - Tools, interchangeable; (for machine or hand tools, whether o |
| 820740 | 820740 - Tools, interchangeable; (for machine or hand tools, whether o |
| 820750 | 820750 - Tools, interchangeable; (for machine or hand tools, whether o |
| 820760 | 820760 - Tools, interchangeable; (for machine or hand tools, whether o |
| 820770 | 820770 - Tools, interchangeable; (for machine or hand tools, whether o |
| 820780 | 820780 - Tools, interchangeable; (for machine or hand tools, whether o |
| 820790 | 820790 - Tools, interchangeable; (for machine or hand tools, whether o |