This 4000W Argon arc Super Laser Cold Welding Machine Mould Repair Spot Welder 220V is a heavy-duty stainless steel welder designed for industrial use. The welding process involves the use of argon arc laser technology, which ensures high-quality and precision welding. The brand of this welder is Shanda, and it is manufactured in China. The welder is suitable for use on various materials, including stainless steel. It has a polarity of AC/DC and operates on 220V. This item is ideal for those in the metalworking and manufacturing industry, as well as those in need of a reliable and efficient welder for their business or office needs.