3/8" Diamond Core Drill Bits, 3 Pack for Drilling Cutting Holes in Glass and Tile Fits Your Drill or Drill Press 3 Pack 3/8" Diamond Core Bit for Glass and Tile; Fits your hand drill or drill press FREE 4 page drilling instruction guide. FREE 5 page decorating ideas guide FREE shipping in the US. No risk - 100% money back guarantee EASY - Use your kitchen scrubbing sponge to hold the glass and cool the bit. Well show you how. Youll make wine bottle lamps, lighted glass block, bird feeders and more