This harrows are ranged among the category of harrows with heavy discs. They are high productivity equipments and work in unit with great power tractors.
| GDM 4,7 | GDM 6,4 | TECHNICAL DATA |
| 14 | 14 | Working depth (cm) |
| 4,7 | 6,4 | Working width (m) |
| 1,6 | 3,1 | Working capacity (ha/h) |
| 40 | 60 | Number of discs |