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This drill bit is perfect for those wanting to drill pearls, shells and glass. We use this drill bit when we want a hole large enough to go on 10ga and 12ga wire for a bangle.
You can use core drills to cut holes in glass, pearls, and shells without chipping or cracking. Our diamond-coated core drills have a 3mm -1/8- shank medium-fine grit and are made of stainless steel on which diamond particles have been electroplated. For best results drill item in water.