This multi-purpose machine is designed for surfacing concrete floors, restoring or preparing wood decks and hardwood floors. Unique belt drive, three-head system is designed for smooth operation with superior results. Counter-rotating head makes this machine easy to operate and control with no sliding. - Bowl Size: 20" Motor: 3HP, 208/230V Single Phase, 10 AMPS, 3450 RPM. Power cord: 50ft, 12/3 wire grounded w/20 Amp twist lock plug. Transport Wheels:6"