Redstone Industries, LLC

The Hoppercone products line was originally founded in Montana by Marvin and Kathy Kaptein. The Kaptein’s started out manufacturing farm machinery such as drill fills, augers, and center sweeps in addition to their own farming. In 1985, believing there had to be a better way to clean out grain bins, they designed and built the first hopper for their own use. Those first hoppers are still in use! Marvin and Kathy relocated to Rock Valley, Iowa in 2007. They designed a unique bolt together hopper allowing even large hoppers to be built and transported in sections. Redstone Industries acquired the Hoppercone product line in 2017. After purchasing Hoppercone, Redstone Industries moved all operations to Iroquois, South Dakota. Redstone Industries specializes in quality steel fabrication. Our primary products are hoppers and related components. However, we also serve local customers with steel sales and custom fabrication.