It can clean virtually any floor surface, very effective on grouted tile and rubberized floors; also cleans carpets, hardwood, profiled ceramics. 2 Counter-rotating brushes that scrub the surface with aggressive action. Twin conveyors lift the dirt-filled solution from the brushes to a central recovery tank or you can choose to double scrub the area picking up the water later. Brushes and drive unit are offset, so the brushes work right up to the edge of the machine and into difficult corners. Excellent as a replacement for bonnet cleaning or interim cleaning.