Hole Saw Primary Material Application General Purpose Materials Cut Aluminum Drywall Plastic Thick/Thin Metals Wood Wood with Nails Arbor Design Not Included Tooth Material Bi-Metal Saw Dia 1 1/4 in Teeth per Inch 3.5 Max Cutting Depth 1 5/8 in Impact Rated No Thread Size 1/2 In.-20 Shank Size 3/8 in Hex 7/16 in Hex Pilot Drill Size 1/4 in dia x 3 1/2 in L