Helical rods are spiral elements that allow the penetrometer (TG 63 series) to anchor itself to the ground using a specific anchoring system. They can also be used for the creation of pre-drilled holes, in combination with specific chisels and thanks to the use of rotary heads.
A distinctive feature of the rods manufactured by Pagani Geotechnical Equipment is their modularity, which makes it possible to reach the desired or required depth in order to ensure the optimal anchoring of the penetrometer to the ground.
Below is an example photo of a helical rod:
| Rod Diameter ∅ | Rod Length | Hexagon | Chisel Type | Application |
| 63 mm | 750 mm | E22 | ∅ 63 mm | Drilling |
| 63 mm | 1000 mm | E22 | ∅ 63 mm | Drilling |
| 100 mm | 750 mm | E27 | - | Penetrometer anchoring TG 63 series |
| 100 mm | 1000 mm | E27 | - | |
| 100 mm | 750 mm | E27 | ∅ 100 mm | Drilling |
| 100 mm | 1000 mm | E27 | ∅ 100 mm | Drilling |