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The Milwaukee Carbide-Tipped “Job Saver” Hole Saw Kit provides the tools necessary for most everyday hole drilling needs; carbide-tipped hole saws are especially useful for drilling holes in ceramic tile, fiberglass, fiberboard, and flake board, but are not recommended for drilling in metal. This 7-piece kit includes the 5 most popular hole saw sizes, plus an arbor and an arbor spacer and adapter in an impact-resistant plastic carrying case. Hole saw sizes include 7/8-inch , 1-inch , 1-1/8-inch , 1-1/4-inch , and 1-1/2-inch. The spacer and adapter allow the 1/4-inch shank arbor to be used on hole saws up to 1-1/2 inches. These hole saws are designed with 4 teeth per inch for more efficient chip clearance and less heat build-up. This kit is backed by a limited 5-year warranty. What’s in the Box 7/8-inch hole saw, 1-inch hole saw, 1-1/8-inch hole saw, 1-1/4-inch hole saw, 1-1/2-inch hole saw, arbor, arbor spacer and adaptor, and plastic carrying case.