Cleaning Efficiency in a Small Scrubber With dependable cleaning performance and an easy-to-use design, the SC401™ walk-behind automatic scrubber is a cost-effective alternative to labor-intensive mop and bucket cleaning and high-priced, large automatic scrubbers. The compact SC401 will increase your cleaning efficiency in small spaces like gas stations and schools. With its center-pivot squeegee system, optimal blade pressure and superior pick-up performance in forward and reverse, just one pass leaves floors clean, dry and ready for use.