H4751 Carbide Hole Saw Saw Dia 4-1/4 In. Tungsten Carbide Tipped Max Cutting Depth 1-1/2 In. Teeth Positive Rake Teeth per Inch 3 Arbor Hole 7/16 in Hex Use Arbor 4XJ25 Not Included Thread Size 5/8-18 Pilot Drill 4XJ28 Included with Arbor Drill Size 1/4 in Dia X 4 in L Cuts Ceramics Fiberglass Hardwoods Cast Iron and Composites