IVY Classic 28100 1H 7/16-Inch Hex Shank Hole Saw Arbor, Fits 5/8 through 1-1/8-Inch Hole Saws, 1/Card Arbor with 1/2-inch-20 thread, adapts 5/8-inch through 1-1/8-inch hole saws for use with power drills Cuts stainless and mild steel, nailed wood and plastic Set screw in alloy-steel body for replacement of Pilot Drill Includes 1/4-inch x 3-1/16-Inch HSS 118-degree split point pilot drill Use with IVY Classic Pilot Bits: 28110, 28111 or 28132, Premium Swift bore (Registered Trademark)