At 1.5 hp and 175 RPM Powr-Flite floor machines are the smoothest operating in the industry. Contractors/floor technicians prefer the Powr-Flite floor machine for their easy start up. Powr-Flite floor machines feature a patented rotationally molded housing that absorbs the shock and torque normally associated with running a floor machine. The M171HD-3 17 model and M201HD-3 20 model are built to take the torque associated with bonnet cleaning and heeling of the floor machine. The M171SD-3 is made specifically for sanding and grinding jobs. The ultra high output 1.5 hp motor provides the power to maintain the speed necessary for the tough floor cleaning jobs and start up where heavier torque is requireâ€“stripping, scrubbing, scraping, grinding, shampooing and bonnet cleaning.