7 Piece Carbide Tipped Job Saver Hole Saw Kit (SKU: 49-22-4075)The Carbide Tipped "Job Saver" Hole Saw kit includes the 5 most popular Hole Saw sizes, an arbor, a spacer and an 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, 1-1/2 inch. The spacer and adapter allow the 1/4 inch shank arbor (49-56-6951) to be used on Hole Saws up to 1-1/2 inch. This handy kit covers most everyday hole drilling needs. Hole Saws have the 4 teeth per inch design. Carrying Case is also sold separately as 48-55-0783. Carbide Tipped Hole Saws are used to drill holes in ceramic tile, fiberglass, fiberboard, and flake board. Carbide tipped Hole Saws are NOT recommended for drilling in metal.