Drill America Hole Cutter, Long, Series: CTH, 3 in dia, 1 in Cutting Depth, Carbide Cutting Edge, 1/2 in Shank, Applicable Materials: Stainless Steel, Cast Iron, Iron, Sheet Metal, Copper and High Density Resin and Metal Plates Drill America CTH3000 Long Hole Cutter, 3 in dia, 1 in D Cutting, Carbide Cutting Edge