Microprocessor controlled, single phase, stud and spot welder machine with automatic torch recognition. Suitable for the professional body shop. Push-button control of welding functions and setting of the material thickness selects a pre-programmed welding time for consistent weld quality. Ideal for all types of single-sided steel body repair techniques including the use of studs, nails, washers and wavy-wires. Supplied with welding-gun mounted slide-hammer for fast dent removal. Set also includes carbon rod for heating and re-tempering spot repairs. May also be used for double-sided spot welding with optional guns.