Tuff Stuff, 93100, 1" Carbide Grit Holesaw Kit With Mandrel, Cuts Ceramic Tile, Marble, Slate, Fiberglass, Laminates & Composites, No Separate Mandrel Or Pilot Drill Needed, Tungsten Carbide Grit Cutting Edge, Continuous Edge Design, Produces Exceptionally Smooth Cuts, No Teeth To Dull Or Chip, Perfect For Do-It-Yourself Ceramic Tile Projects, Carded.