Plug the back bolt into the open hole and fasten it to the right position with the matching screw. Dali back-cut technology is composed of drilling tools and hanging system. The appearance of this technology broadens the vision of curtain wall design.
| Size d | M6 | M6 | M6 | M6 | M6 | M6 | M6 | M8 | M8 | M8 | |
| D | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 9.5 | 9.5 | 9.5 | |
| Anchorage depth | 5 | 7 | 9 | 12 | 15 | 18 | 21 | 15 | 18 | 21 | |
| Diameter of holes | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 11.5 | 11.5 | 11.5 |