10pc Diamond Tipped Drill Bit Set - 1/16, 5/64, 3/32, 1/8 - Drill Glass Stone - Fits Dremel Twist drill bits for fine-detail drilling with the cutting power of diamond 10 bit set, two each in diameters 5/64" & 3/32" and three each in 1/16" &1/8" Industrial diamond permanently brazed to cutting tip during manufacture; high-speed steel shaft Hardest drilling material available, cuts glass, stone, tile; protective hard case Lengths 2" to 2-1/2"; use with pin vise for hand drilling or Dremel-type rotary tool, power drill