Eaton Leonard was founded in 1973 in Santa Ana, California, by Homer Eaton and Leonard Zerlaut. At this time, the company introduced the first tube measuring system to the tube manipulation industry. Over the years, Eaton Leonard became an industry leader in the areas of tube bending and measuring, and expanded its measuring business to include designing and manufacturing tube checking gauges at its subsidiary, Tube Fixture, in Cologne, France. In September 2013, Eaton Leonard merged with AddisonMckee bringing together the ingenuity, creativity, and global scale of both companies and its employees to better serve the combined customer base.