Profile: Kelly Duplex Mill & Manufacturing Co. manufactures equipment for material handling and agricultural applications. We offer a broad range of both standard & custom material handling machinery. We supply tools design and fabrication services. Our products are marketed under the Kelly Duplex brand name. Our agricultural machinery products include mixers, portable bulk scales, twin molasses mixers, corn cutters & grinder and hammer mills. We market screw conveyors, mixers, bucket elevator, belt conveyors, diverter valves, slide gates and lump crushers.