| Model Number | Screw size | Screw Diameter (mm) | Screw Lenght (mm) | Rail Number |
| NSRI-10 | M1.0 | 1.2 - 9 | 1.6 - 10 | SR10 |
| NSRI-12 | M1.2 | 1.4 - 9 | 1.8 - 10 | SR12 |
| NSRI-14 | M1.42 | 1.6 - 9 | 2.0 - 10 | SR14 |
| NSRI-17 | M1.7 | 1.9 - 9 | 2.3 - 10 | SR17 |
| NSRI-20 | M2.0 | 2.2 - 9 | 2.6-20 | SR20 |
| NSRI-23 | M2.3 | 2.5 - 9 | 2.9 - 20 | SR23 |
| NSRI-26 | M2.6 | 2.8 - 9 | 3.2 - 20 | SR26 |
| NSRI-30 | M3.0 | 3.2 - 9 | 3.6 - 20 | SR30 |