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Dremel 663DR 1/4-Inch Glass Drilling Bit
Drill holes in both flat and contoured glass
Diamond-impregnated cutting bit for long life
Diamond grit around the circumference of the bit allows it to rasp a larger hole if needed
Holes on the side of the bit allow the removal of material
This diamond-impregnated core-style bit features superior long life and is 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.