A nibbler uses a punch and die to make the cut, this is perfect for tight radius cuts into steel. A 1.65 in starter hole is all that is needed to start or start from the edge of the material. A nibbler is also what you need if you are cutting corrugated metal. The 6880 is our heaviest nibbler with 10 ga capacity in steel and 12 ga into stainless. Milwaukee® Corded Electric Nibbler, Double Insulated, Tool/Kit: Kit, Cutting Capacity: 12 ga Stainless Steel, 10 ga Steel, 2-1/2 in Cutting Radius, 1000 spm Strokes per Minute, 120 VAC/VDC, 4 A, Metal/Nylon Housing Material, Side Handle, 8 ft Fixed Cord, Toggle Switch Control, 12-1/4 in Overall Length