I bought this combination TIG/Plasma cutter back in 08. (think I paid something like 800.00 for it then) It uses some sort of goofy ass technology to perform the TIG function that makes it very light (only weighs about 30lbs). The Plasma cutter is like 180 amp variable, capable of cutting through 1/2" steel. The TIG torch has a trigger, and I bought the variable foot control as well . I never had the patience to learn to master the TIG portion, so I rarely used it. It sat right here in the corner, being mostly unused w/ the exception of the plasma cutter up until sometime in 2012 when I sold it to a friend for 500.00 w/ an empty bottle of 100% argon. I bought it back yesterday for 300.00, only this time the bottle was full. He was kinda rough on it, the bakelite fitting that surrounds the gas output is shattered, and he let alot of the connector screws get really loose to the point of a few falling out,....but other than that, I plugged it in and cut a chunk out of a piece of .500 plate in like 5 seconds,...... so the P/C part works like day one. I'm gonna build the intake for my car out of 16ga. mild steel. Unlike the exhaust manifold, I don't want to have to grind off the welds,..so I'm gonna have to spend some time learning to do a better job w/ the TIG function.