Harger offers innovative Solutions for Exothermic Welding Materials, Accessories and Training.Ultraweld® uses high density, long lasting, semi-permanentgraphite molds. Ultraweld® can be used with UltraShot® Harger DRONE® or NuwTube®. UltraShot® is ignited with the DRONE® using a Milwaukee® M18TM REDLITHIUMTM 18 volt battery featuring a built-in fuel gauge. We offer full line of accessories to make you exothermic connection process safe and efficient.