D/F® is the registered trademark of D/F Machine Specialties, Inc. D/F Machine Specialties, Inc. is not affiliated with Lincoln Electric®, Miller Welding®, ESAB®, Linde®, Tweco®, Thermal Arc®, Profax®, American Torch Tip®, Superior Consumables®, Fanuc Robotics®, Thermadyne®, ABB®, Hobart®, Kuka®, Mavrix®, American Weldquip®, Motoman®, OTC®, Panasonic®, Welding Alloys®, Pandjiris®, Bug-O Systems®, and other MIG & TIG welding manufacturers. Those manufacturers mentioned are for reference only and are the registered trademarks of their respective companies.