Milwaukee® Hole Saw Kit, General Purpose, Series: HOLE DOZER™, 9 Piece, Variable Pitch, 1/2-20 Thread, 3/8 in Hex Shank, 1/4 in Dia x 3-1/2 in L Pilot Drill, 1-5/8 in Cutting Depth, 4/5 TPI, For Use With: Mild Steel, Stainless Steel, Nail Embedded Wood, Plastic, Duct, Pipe, Tube and Nonferrous Metals, Bi-Metal Saw/HSS Teeth