There are also materials that can only be processed by a specific unit.
COMPOST AND BRANCHES
The MB-HDS shafts screener easily aerates and breaks up the material, even if the it is wet or compacted. The same goes for twigs and scrubs that are crushed down and processed.
Abrasive material can excessively wear out the shafts of a MB-HDS shafts screener. This is why an MB-S screening bucket would be better suited to separate iron scraps, because the material stays in the basket, while the dirt / dust / flakes fall through.