Mindrill is one of the leading manufacturers and suppliers of Ground Piercing Tools that have been providing accurate horizontal bores beneath roads, railways, and landscaping worldwide. Minimal operating space is required, and the pneumatic boring tool complements larger directional drilling equipment. Unique reverse mechanism. You can easily reverse the Grundomat during the bore, by adjusting a lever on the lubricator control system. There is no need to turn the air hose or stop the molding tool.