The Digital Capacitive Stud Welder welds sheets from 0.5mm thick without marking the opposite side, weldable sizes from M3 to M8 or M3 to M10. Machines that work with energy from 1,600 to 2,000 Joules (220V/10A/50-60Hz), weldable materials such as carbon steel, copper-coated carbon steel (COPPER PLATED), stainless steel, brass, and aluminum. It features a high-resistance gun with pressure adjustment and easy collet replacement.