Founded in Xenia in 1992, TDL Tool designs and builds tooling and specialized machinery while also providing the machining and metalworking services needed to bring those projects into production. The company has grown from a 4,000-square-foot shop built by founder Steve Mangan into a broad manufacturing operation, with notable work ranging from large-format EDM to automation systems and custom prototypes. Since 2017, TDL Tool has been owned by Steve Mangan’s sons, Tim and Dan.