Features and Benefits: * Electric weld will not stick to the copper pads * Strong magnetic base * For use with TIG and MIG electronic welders * Copper pad dissipates heat * Saves time and labor, quicker cleaner welds Position magnetic base so that the copper pad is behind joint or hole to be welded. Adjust knob up or down so that copper pad is flush against the back of void to be welded, and weld up hole. Remove tool and grind the excess weld.