... and light, easily work in high alitude. It is easily arc,small flash, low noise, which can improve working surrounding.That ... above 500A can dig by compressed air and arc of carbon stick.It is used for welding various of ... 2pcs, allen-key 1pcs.2. SpecificationParamter ARC-315 (ZX7-315) ARC-400 (ZX7-400) ARC-500 (ZX7-500) ARC-630 (ZX7-630) Rated input ...