LENOX Plumber's Carbide Grit Hole Saw Kit, 9 Piece Hard tungsten carbide grit cuts through fiberglass, ceramic tile, laminates, and other abrasive materials Carbide grit edge will not snag or chip when cutting thin materials Solid back design collects dust and debris Cuts abrasive materials quickly Carbide grit provides smooth cutting Kit contains 3/4", 7/8", 1-1/8", 1-1/2", 2-1/8", 2-9/16" holes saws; 2L 1/2" and 1L 1/2" standard arbors, and one arbor adaptor