Air Powered Flange/Punch Tool – One side of the double-action head produces .040″ offset flanges on up to 20 gauge metal for clean welding with little grinding. The other side produces perfectly clean 3/16″ (5.5mm) holes, ideal for plug welds. Swivel-head design lets you work from almost any angle. Punches metal up to 14 gauge. Requires 4 cfm @ 90 psi. imported.