Diamond Coated Twist Drill Bits : 4 Different Sizes (5 Each) Total of 20 Pieces
Used by Jewelry Designers for drilling clean holes on Beach Sea Glass, Sea Shells, Rocks, Marbles, Stones, etc.
Practical – Suitable to be used with hand drills, flex shafts and dremels.
Experience needed, you may break few bits during practice. Use with water – do not run dry.
Comes in plastic bag bulk packaging.