The VIKING air punch and flange tool is a unique 2-in-1 metalworking tool. Head rotates 360° for versatility and ease of operation. Used to crimp up to 14-ga. materials together, and then turn the head 180° to punch a clean 3/16" hole for your welding operation of sheet metal fasteners. Insulated handle adds comfort and a nonslip grip. Muffled handle exhaust directs air away from work.