Does exactly what it says it does. It has a wide output current range. The table "recommended thickness" is incorrect. I had to deviate from the recommended range to get a solid spot weld. Maybe my nickel is impure, but most likely it's just bad ranges. A crappy $50 spot welder made stronger spot welds than the recommended chart settings. I installed it higher and I got really good spot welds with this product. I will soon test it on 0.20 mm thick nickel strips.