Dremel 663DR
1/4 inches diamond coated cutting head
1/8 inches shank
Allows you to drill holes in glass with your Dremel rotary tool
Core-style bit features superior long life
Ideal for drilling in both flat and contoured surfaces

Diamond grit a full 360-degrees around the circumference of the bit allows it to
be used in a rasping action to enlarge a hole if needed
Holes on the side of the bit allow the removal of glass dust from inside the bit
Use with cutting oil (not included) to increase the speed of cut and prevent damage to the bit from overheating
For use on glass, ceramic wall tile, glass block, glass bottles, and jewelry