8pc Tungsten-Carbide Grit Hole Saw Cutter Kit Masonry ceramic plastic fiberboard 8pc Tungsten-Carbide Grit Hole Saw Cutter Kit Masonry ceramic plastic fiberboard Fit on Drill: 500rpm, Driver depth: 55mm Included Locating Plate pilot drill File: 10" (250mm) 5 Hole-Saws: (1-1/4", 2-1/8", 2-5/8", 2-7/8", 3-1/4") Self sharpening hole saw for long time use