The DG-16 Diamond Grinder/Polisher with 16-in.-diameter path features a rubber-mounted, nonplanetary grinding head controlled by spring pressure. Its design—including wheels, a floating head, and specially designed diamonds—allows grinding or polishing without scarring or gouging concrete, even on cracks and expansion joints. BW Manufacturing Inc. 616-447-9076. www.bwmanufacturing.com [WOC Booth S11213]