Milwaukee 49-22-4075 7-Piece Carbide Tipped Job Saver Hole Saw Kit 7-piece hole saw kit includes the 5 most popular hole saw sizes, an arbor, arbor spacer, adapter, and carrying case Perfect for drilling holes in ceramic tile, fiberglass, fiberboard, and flake board; not designed for metal drilling Carbide-tipped hole saws designed with 4 teeth per inch Spacer and adapter allow 1/4-inch shank arbor for use on hole saws up to 1-1/2 inches Hole saw sizes include 7/8-inch, 1-inch, 1-1/8-inch, 1-1/4-inch, and 1-1/2-inch; backed by 5-year limited warranty