Dremel 9936 Structured Tooth Tungsten Cardide Cutter Wheel
Structured tooth tungsten carbide cutter, 1/8-inch shank, 3/4-inch diameter wheel shape cutter.  If you have a lot of material to remove the fast cutting, sharp teeth will work wonders.  Can be used on a variety of material including fiberglass, wood, plastic, epoxy, rubber, laminates, particle board, soft metal, and ceramic tile.