Attaches to an arc welder. £22 postage hermes £3 UK. Also selling 140A welder £45 southampton. Can be used to mend a VW - moderators https://www.ebay.co.uk/itm/Spot-Wel...Welder-2-carbon-electrodes-weld-/142087531578
Worked best when you could clamped the metal as well. Best google for impartial reviews. It worked reasonably well, bit of practise. It worked miles better than the arc brazing accessory - that was pants. Depends what other kit you have. If you have an mig then use stand off nozzle.