VEVOR Spot Welding Dent Puller 3000-Watt Stud Welder Dent Repair Machine Kit 110-Volt 7 Models for Car Body Dent Repair BJXFJG90E3KW00001V1 - The Home Depot
STARK USA 1/8 in. 120-Volt 13.5 Amp Professional Single Phase Spot Welder 55009-H1 - The Home Depot
Portable 120 Volt Spot Welder from Harbor Freight, Chicago Electric Welding, NTDT! - YouTube
Resistance spot welding and what to know about the technology