Pro Spot says the SP-1 Pulse MIG is ideal for body shops welding stainless steel or aluminum. In synergic mode the microprocessor controls optimal arc stability and weld quality. The SP-1 also comes equipped for MMA/stick welding. There is an optional TIG torch available. MIG and TIG welding can be done in continuous or pulse mode. The SP-2 Smart MIG has two MIG torches that can be set up for aluminum and silicon bronze or steel. The shielding gas and weld program with the appropriate synergic curve automatically switch when pulling the trigger. The SP-5 Smart MIG (shown here) steps things with up with three MIG torches that can be set up for three different base metals.