Dynabrade Inc. (www.dynabrade.com) introduced a 4 hp, 25,000 rpm version of its Dynafile II abrasive belt machine for grinding, deburring, blending, finishing and polishing metal and other materials. The grinding head pivots 260 degrees, and the tool features a 7-degree offset handle. The company says the new model can be used for setting grain patterns and removing oxide and weld discoloration.