The Conquer20 grinder/polisher is equipped with a sturdy, well-balanced chassis and a 5-hp cast-iron motor that provides the floor-flattening capabilities of larger machines, while allowing for maneuvering a smaller footprint. The single-speed version is ideal for most residential and light commercial contractors; a variable-speed model is suited for contractors needing versatility and a heavy focus on polishing. Kut-Rite. 877-786-5067.