We are a small business based out of Tennessee. Our tools have helped hundreds of owner operators, independent dealers, and truck shops across North America. Our most popular product is the DD13/DD15 tool. It was created by the owner of Diesel-Tools, Todd Gass. He created it in order to fix a problem that he constantly saw occur in truck shops. The tool, while it may seem expensive, pays for itself after only one use. Therefore there is an immediate return on investment.