| NO. | SIZE IN INCH | SIZE IN MM |
| 1 | 4" | 100 |
| 2 | 6" | 150 |
| 3 | 8' | 200 |
| 4 | 10" | 250 |
| 5 | 12" | 300 |
| 6 | 18" | 450 |
| 7 | 24" | 600 |
| 8 | 36" | 900 |
TOWER BOLT(HEX) 12mm(1by2) Ex.Heavy
 12mm(1by2) Ex.Heavy.jpg)
| NO. | SIZE IN INCH | SIZE IN MM |
| 1 | 4" | 100 |
| 2 | 6" | 150 |
| 3 | 8' | 200 |
| 4 | 10" | 250 |
| 5 | 12" | 300 |
| 6 | 18" | 450 |
| 7 | 24" | 600 |
| 8 | 36" | 900 |