Hole Saws Impact Rated Hole Saw Primary Saw Application Metal Saw Dia 1-3/8 In. Max Cutting Depth 1/2 In. Arbor Design Built-In Tooth Material Bi-Metal Teeth per Inch 10 Tooth Material Grade M42 Shank Size 1/4 in Hex Pilot Drill Size 5/32 in Dia x 3 in L Application Metal Drilling Impact Rated Yes