Contains: 2XHEX SHANK MANDRELS, 2XPILOT DRILL BITS, 9 HOLE SAWS DIA 16, 19, 25, 32, 38, 44, 48, 51, 64MM. Double tooth design strengthens each tooth for longer life and improved durability. Thick, hardened backing plates prevent thread stripping. Increased high speed steel height (highest in the industry) improves hole saw durability. Sharper Tooth Geometry cuts material faster for faster drilling. Deep cut style holes saws will cut 2x material in 1 pass. Include a rugged case.