Self drilling anchor rods are primarily used in relatively stable and intact rock formations. Resin, engineering adhesives, and quick-setting cement are injected directly into the center of the anchor bolt, resulting in better anchoring quality than ordinary anchor bolts. Due to the advent of self-drilling hollow grouting anchor bolts, they can also be used in loose soil and rock formations.
| Item. | Inner diameter (mm) | UItimate Load Strength{K N) | Yield Strength(KN) | Weight(kg/m) |
| R25N | 14 | 200 | 150 | 2.3 |
| R32N | 21 | 280 | 230 | 2.9 |
| 18.5 | 280 | 230 | 3.4 | |
| R32S | 16 | 360 | 280 | 3.6 |
| R32SS | 15 | 405 | 350 | 4.1 |
| R38N | 21 | 500 | 400 | 4.8 |
| 19 | 500 | 400 | 5.5 | |
| R51L | 36 | 550 | 450 | 7 |
| R51N | 33 | 550 | 630 | 8.4 |
| T30 | 11 | 320 | 260 | 3.41 |
| 14 | 275 | 220 | 2.87 | |
| 16 | 245 | 190 | 2.7 | |
| T40 | 16 | 660 | 525 | 7 |
| 20 | 540 | 425 | 5.6 | |
| T52 | 26 | 925 | 730 | 9.87 |
| T73 | 53 | 1160 | 970 | 14.1 |
| 56 | 1035 | 830 | 10.75 | |
| T76N | 52 | 1600 | 1200 | 15 |
| T765 | 45 | 1900 | 1500 | 19.7 |
| T103 | 51 | 3660 | 2670 | 44.6 |
| T130 | 60 | 7940 | 5250 | 75 |
