3-Pack, 1/8" Diamond Core Drill Bits For Glass and Tile | Free Beginner's Drilling Guide | You&rsquo;ll Drill Glass and Tile FREE Beginners Drilling Instructions. Easy to use. FREE shipping in the US. No risk - 100% Money Back Guarantee This set contains 3 new 1/8 diamond core bits for glass. They fit your drill, drill press or Dremel tool EASY - Use your kitchen scrubbing sponge to hold the glass and cool the bit. Well show you how. You'll drill glass, ceramic tile, porcelain, wine bottles, ceramics, and stone.