Drill America CTH3312 3-5/16" Carbide Tipped Hole Cutter, 1" Depth of CutDrill America CTH3312 3 5 16" Carbide Tipped Hole Cutter, 1" Depth of Cut Works like an annular cutter, except no magnetic drill needed! Carbide tipped hole cutters are good for cutting stainless steel, cast iron, iron, sheet metal and copper. It also works well with abrasive materials like high density resin and metal plates. Has auto ejecting slug and can cut over 300 holes in stainless steel plate. Comes with Pilot Drill and Hex Key. Size: 3 5 16,