The compact UNIDRIVE 500 automatic welder impresses with its many advantages. Guided by two handles, you will achieve the right pressure to ensure safe welding. Changing direction – via key combination and dual drive, it couldn’t be simpler! The UNIDRIVE 500 welds every overlap. Everywhere, even if space is tight, and three times faster than manual welding. Lap welding with the UNIDRIVE 500 – safe and economical – everywhere. .