Powerful scrubbing, stripping and polishing at 175 rpm. Safety enhanced interlock switch leaves both hands conveniently in control. Safety enhanced nonconductive dual triggers. 48" tall handle is fully adjustable for all operators. Precision-balanced, 1.5 hp, heavy-duty, 66-frame motor. 15", 17" and 21" size traditional all metal reinforced bell housing aprons. Fast brush mount with a “B” style/92" style brush drive plug. Scrubbing brushes have a 2" smaller block than the buffer size. Pad driver with 1" riser is 1" smaller than buffer size. Separate 50-ft. safety power cable. Motor plugs in at handle base for easy maintenance. Nonmarking retractable 6" wheels for easy transport. Manufacturer’s five-year warranty on motor, transmission and chassis. 21" Apron Size.