The Etch-O-Matic marking system is Martronics Corporation's self-etching product line. Starter kits and super sets come with a marker unit that uses 2 to 10 amps, or 10 to 15 volts - perfect for powering light-duty marking on glass, metals, and other tooling materials. Etch-O-Matic options and refill accessories are proudly made in the USA in Salkum, WA.