One piece all metal handle housing, tube and trigger assembly. Safety lock out on handle with easy access thumb action - even with both hands on the handle. Heavy-duty all steel triple planetary transmission with 3 year warranty. Ultra high output 1.5 hp motor with lower amp draw for the ultimate in power. Patented rotational molded housing absorbs vibration and controls torque for easy operator control. A machine that does it all! Scrub, strip, spray clean and buff, bonnet clean, shampoo, scrape, grind or sand! Pad diameter: 17" or 18" full pad-to-floor contact. Motor: 1 1/2 hp, UL approved, high torque. Transmission: Triple planetary drive; RPM: 175.