Swivel Scrub Brush: Swivels onto its side to clean hard-to-reach areas where floor machines can’t reach. Use the general scrub for routine scrubbing and power scrub for heavy scrubbing and stripping of wax build up. Polyester scrub resists water, high temperatures, acids, alkalis and most cleaning solutions. All-around polypropylene scrub with its stiff polypropylene bristles gets into places that would be impossible with a normal floor brush.