The Lincoln tig welder Precision TIG 375 Description: Patented Micro-Start II Technology - Delivers extremely stable low amperage starting, welding and cratering for both AC and DC welding; Selectable welding modes - Such as high frequency, scratch start, and Touch Start TIG; High duty cycles - 375 amps at 40% duty cycle; Widest welding range in its class - 2-420 amps for both AC and DC; Advanced Control Panel - TIG pulser allows you to control heat input for any weld