Hole Saw, Primary Material Application Steel, Materials Steel, Arbor Design Not Included, Tooth Material Bi-Metal, Saw Dia. 2 1/2 in, Teeth per Inch 4/6, Max. Cutting Depth 1 5/8 in, Impact Rated No, Shank Size 1/2 in Round, 7/16 in Hex, Pilot Drill Size 1/4 in dia x 4 1/4 in L