Expertly balanced for ideal pad-to-floor pressure and sustained RPMs. You get total pad-to-floor contact, which means greater efficiency, speed and overall cost-savings. Provides excellence in design, operator comfort, and unsurpassed burnishing performance. Specially patented design combined with precision balanced weight distribution which eliminates the need for a compensating center or front mount caster. Self-adjusting pad driver. One piece rotationally molded housing designed to absorb the torque and vibration normally felt when operating high speed. 1.5 hp motor.