Hole Saw Kit, Maximum Cutting Depth: 1-5/8 inch, Drill Size: 1/4 inch dia x 3-1/2 inch L Pilot, Teeth per Inch: 4/5, Thread Size: 1/2-20, 5/8-18, Number of Pieces: 16, Material: Bi-Metal and High Speed Steel Teeth, Shank Size: 3/8 inch Hex, 7/16 inch Hex, Includes: (1)3/4 inch Hole Dozer Bi-Metal Hole Saw, (1) 7/8 inch Hole Dozer Bi-Metal Hole Saw, (1) 1 inch Bi-Metal Hole Saw, (1) 1-1/8 inch Hole Dozer Bi-Metal Hole Saw, (1) 1-3/8 inch Hole Dozer Bi-Metal Hole Saw, (1) 1-1/2 in Hole Dozer Bi-Metal Hole Saw, (1) 1-3/4 in Hole Dozer Bi-Metal Hole Saw, (1) 2 inch Bi-Metal Hole Saw, (1) 2-1/2 inch Bi-Metal Hole Saw, (1) 2-1/4 inch Hole Dozer Bi-Metal Hole Saw, (1) 2-1/8 inch Bi-Metal Hole Saw, (1) 3/8 inch Hex Shank Arbor, (2) 3-1/2 inch Pilot Bit, (1) 1/8 inch Hex Key, (1) 7/16 inch No Wobble Arbor, Applications: For Mild Steel, Stainless Steel, Nail Embedded Wood, Plastic, Duct, Pipe, Tube, Nonferrous Metals