Plug welds are typically easier to produce and much stronger than spot welds. With Eastwood Plugweld Pliers you can clamp and supports the weld area, compressing the panels for tight plug welding. The copper-alloy swivel back pad will eliminate the problem of burn-thru because it absorbs excess heat and the weld will not stick to it either. The "U"-shaped movable jaw provides even clamping pressure around the spot to be welded.
Copper pad eliminates problem of burn-thru
Weld won't stick to copper pad
"U"-shaped jaw put pressure all around the spot to be welded
Locks in place like a locking pliers