Bolt welding

Welding ranges:
4 to 5/16″ (7/16″ limit) diameter;
From 14 ga to 5/16” (3/8″ limit) diameter;
From M3 to M8 (M10 limit), diameter;
From 2 to 8 mm. (10 mm. limit).

Welding material: Steel, stainless steel, aluminum and brass