The harder alloys are generally more easy to weld. This Tig spot kit is for spot welding 20- and 18-gauge steel, conversely pure aluminium is not recommended for spot welding. Aluminium oxide, which forms naturally on the aluminium surface, has a very high electrical resistance.

The pliers are identical in both kits and are also available for individual purchase under Item #13899.

Not entirely sure as I'm not that versed in Tweco units

Now you can "spot weld" with your TIG welder...just add our exclusive TIG Spot Weld Nozzle to your tool box! Use your TIG welder together with this TIG Spot Weld Nozzle to produce professional spot welds without a large resistance welder. Duplicate full-penetration OE spot welds from one side with your existing TIG welder No need to buy a resistant spot welder (about $250!) or fool with carbon arc rods "Leg extensions" create exact standoff distance for spot welding 20- and 18-gauge steel Spot Welding in the past had primarily been done by large resistance welders but can now be achieved with your TIG welder and this Spot Welding Kit from Eastwood. Spot welding is accomplished by clamping two panels together and fusing them with a number of welds sequentially placed rather than a continuous bead to hold the panels together. This kit is designed to be used with Eastwood's TIG Welders as well as any other brand welder that utilizes a 17 size TIG torch.

Tig welds are pliable where mig welds are brittle

This nozzle would be for the use of fusion spot welds

This will be in the settings chart in the instructions for the TIG welders we sell. We apologize for the confusion. If you would like a copy of this sent to yo before buying the welder- please email us at tech@eastwood.com and we can certainly get this over to you.