| Application | Compressive strength (kg/cm²) | types |
| Soft rock | less than 500 | Tooth |
| Medium rock | 500 ～ 1,000 | Tooth, Insert |
| Hard rock | more than 1,000 | Insert |
| Bit size (in) | Bit size (mm) | API pin size (in) |
| 3-7/8 | 98.4 | 2-3/8 A.P.I.Reg. |
| 4 | 101.6 | 2-3/8 A.P.I.Reg. |
| 4-3/4 | 120.6 | 2-7/8 A.P.I.Reg. |
| 5-5/8 | 142.9 | 3-1/2 A.P.I.Reg. |
| 6-1/4 | 158.7 | 3-1/2 A.P.I.Reg. |
| 7-5/8 | 193.7 | 4-1/2 A.P.I.Reg. |
| 7-7/8 | 200.0 | 4-1/2 A.P.I.Reg. |
| 8-1/2 | 215.9 | 4-1/2 A.P.I.Reg. |
| 8-5/8 | 219.0 | 4-1/2 A.P.I.Reg. |
| 9-7/8 | 250.8 | 6-5/8 A.P.I.Reg. |
| 12-1/4 | 311.2 | 6-5/8 A.P.I.Reg. |
| 13-3/4 | 349.3 | 6-5/8 A.P.I.Reg. |
| 14-3/4 | 374.7 | 7-5/8 A.P.I.Reg. |
| 17-1/2 | 444.5 | 7-5/8 A.P.I.Reg. |