The UltraGrind is the newest addition to the manufacturer's extensive line of floor stripping, buffing, and polishing machines. The product is designed for more aggressive concrete floor grinding and polishing jobs. Weighing more than 500 lb., the UltraGrind provides the ideal 40 lb. of head pressure per diamond abrasive for maximum results and has standard 2-in. exhaust ports for concrete dust. Aztec Products. 800-331-1423.