The patented axle tensioning system allows:-
- sharp cutting edge to be maintained over the life of DD ring
- maintains ‘drive’ between axle components therefore avoiding blockage and stoppage or the roller.

Sharp cutting edge ensures optimum clod cutting and improved cultivation action.

DD Rings are manufactured from the highest quality Boron steel. This quality of material and the tensioning system avoids the need for welding the rings. The specification of the material also ensures optimum wear and high durability against damage from stone/rocks.

The transition of the DD ring from the cutting edge to the firming part of the ring results in:-
- cuts in moist soil are propagated deeply avoiding the ‘smearing’
of the soil surface.
- no compaction of the soil surface
- optimum soil consolidation at the surface and at depth.

Relationship between ring spacing, diameter and width results in optimum soil consolidation and minimises soil blockage between the rings. It also ensures the soil between the rings is not over consolidated as this is critical for a weatherproof surface which maintains soil moisture (in dry conditions) and allows good drainage (in wet conditions) avoiding soil erosion.