The MDS M413 is a heavy duty, 3-split trommel screen ideal for construction and demolition waste/debris and aggregates up to 24" in size. The three heavy-duty conveyors split off for up to three products - mid (up to 12"), fines (up to 6"), and overs (up to 24")., The heavy duty drum is great for dirty, sticky materials - cleaning clay-bound rock easily.