Aztec Products Inc. has introduced the UltraGrind propane-powered, planetary-head, gear-driven grinding and polishing machine. The Aztec UltraGrind has been designed for the more aggressive concrete floor grinding and polishing applications, where the goal is to both remove material and highly polish concrete floors. The UltraGrind machine is complementary to the Aztec DiamondShine, which is specifically designed for ultra-high-speed, largearea concrete polishing applications. Weighing more than 500 pounds, the UltraGrind provides 40 pounds of head pressure per diamond abrasive for maximum results. The UltraGrind has industry-standard 2-inch exhaust ports for concrete dust vacuums. It also has an 8-gallon water tank, potentially adding up to 80 additional pounds of head pressure and allowing the user to rewet the floor while polishing. The Aztec UltraGrind is powered by the new 20- horsepower Kawasaki 603CC engine. ? www.aztecproducts.com