Lincoln Electric Flextec 350X Construction Welder – K4271-1 350 Amp Industrial Multi-Process Powerhouse Heavy-duty Lincoln Electric Flextec 350X (K4271-1) built for construction, pipeline, fabrication, and jobsite abuse. This is a true industrial inverter welder—not hobby junk. Stick / TIG / MIG / Flux-Core 3-Phase Input Up to 350 Amps Output Construction Series – Jobsite Tough Smooth Arc / Reliable Lincoln Performance 14-Pin Compatible for Feeders & Remotes Used, fully functional, normal cosmetic wear from professional use. Ready to work. Perfect for structural steel, pipe welding, industrial repair, and fabrication shops. Keywords: Lincoln Flextec 350X, K4271-1, Lincoln Electric Welder, Industrial Welder, Multi Process Welder, Stick TIG MIG Welder, Construction Welder, Pipeline Welder, 350 Amp Welder