The N550c Arc Charger™ is the first of a revolutionary new class of stud welding power sources. The N550c Arc Charger™ has the capacity to weld the full range of drawn arc studs, up to ³/₈" pitch diameter, with an ultra smooth high speed switching welding arc, while requiring power from just a standard household 120V wall outlet. This breakthrough combination enables high-strength drawn arc stud welding in just about any location, without the need for high-voltage, industrial 3-phase power, or a large generator.