KFK Locksmith Plant produces light load-bearing steel and aluminum constructions. Welding is performed by MIG / MAG, TIG and REL welding processes of structural steels, stainless steels and aluminum. The production of steel and aluminum structures is certified according to EN 1090-1 (EXC2 level). Welding processes are certified in accordance with ISO 3834-3 with certification of welding procedures and certification of welders. Within KFK locksmithing, internal NDT control is performed for surface non-destructive methods of weld control, in which testing is performed by certified NDT inspectors.