The Miller Spectrum 625 Xtreme plasma cutter shown here is a convenient method for cutting and uses compressed air, which is typically available in most applications via shop or portable compressors. The 40-amp unit weighs just 21 pounds, light enough to be carried by its shoulder strap. At 12-inches per minute the machine cuts 5/8-inch mild steel and cuts 1/4-inch steel at 60 inches per minute. Automatic Air Regulation automatically adjusts torch air pressure for optimum cutting and gouging performance. It's ideal for automotive, body shop, maintenance, and personal-use. We found this unit for a cost of $1,464.95.