Milwaukee ONE-PIECE CARBIDE CUTTERS feature Carbide Teeth for Longer Life and Smooth cuts in stainless steel and other hard metals. Each cutter features a Stop Shoulder Design which prevents over-drilling, limiting cuts to a 3/16 in. depth, while a 3-Flat Shank optimizes each cutter for use in Drill/Drivers. To ensure clean, efficient cutting, the Spring Loaded Pilot Bit provides complete plug ejection upon completion of each hole. The solid one-piece design of each cutter provides added durability and dependability cut after cut. Milwaukee One Piece carbide Cutters are available in sizes ranging from 3/4 in. - 4-1/2 in. One-Piece Design For Added Durability For Use With Drill/Drivers Includes: 7/8 in., 1-1/8 in., 1-3/8 in., 1-3/4 in., 2 in, 2-1/2 in. Cutters, Hex Keys, and (2) Additional Pilot Bits For Use In Stainless Steel, Mild Steel, Copper, Aluminum, and Other Metal Materials Includes: 7/8 in. One-Piece Carbide Hole Cutter - 49-57-8609,1-1/8 in. One-Piece Carbide Hole Cutter - 49-57-8615,1-3/8 in. One-Piece Carbide Hole Cutter - 49-57-8623,1-3/4 in. One-Piece Carbide Hole Cutter - 49-57-8629,2 in. One-Piece Carbide Hole Cutter - 49-57-8631,2-1/2 in. One-Piece Carbide Hole Cutter - 49-57-8639,(2-Pc.) Carbide Hole Cutter Pilot Bit - 49-57-8660,(2-Pc.) Hex Keys,Case.