769-3151: Used mainly with higher temperature alloys and commutators, soldering cans, boxes, transformer casings, heat exchangers and radiators
769-3160 and 769-3157: General soldering on transformer casings, soldering on commutators up to 2in dia. , tin plate and metal box fabrications
769-3167 and 769-3163: Heavy maintenance work including electronic motors with high temperature alloys, large metal boxes, joining busbars