DONT KNOW A THING ABOUT IT OR HOW TO USE IT...BUT IT WAS FREE AND THE GUY SAID IT DEFFO WORKS....MIGHT BE A CHEAPER OPTION RATHER THAN BUY A NEW MIG TO ASSEMBLE MY CHASSIS..BEST GET SOME RODS AND GAS AND START PRACTICING MY CHASSIS IS MADE FROM 25MM X 1.6MM BOX WHAT RODS / TIPS /COLLETS / GAS DO I NEED