1-4in Core Diamond Drill Bit

For use on glass, ceramic wall tile, glass block, glass bottles, and jewelry. For drilling in both flat and contoured surfaces. Diamond-impregnated cutting bit. 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. Includes cutting oil and instructions.

• GLASS DRILLING BIT
• Size In=1/4