Koblenz 20" 1.5HP Heavy Duty Industrial Floor MachineThe Koblenz Heavy Duty Industrial Floor Machine features triple planetary all steel gears, durable all metal construction and a cast iron base. With non marking, sealed, double ball bearing wheels and wrap around bumper guard and a cool running, continuous operating heavy duty motor. Koblenz offers the best modern technology can make. With more features like safety switch and locking mechanism, protection against operator error. 13 gauge chrome steel