Drilling Small Holes in Jewelry and Ornaments
These directions apply to using our 2.1 mm Drill Bits (7239) to produce high-quality hole with minimal blow-outs (chipping out the back side) in small-scale pieces of fired or unfired sheet glass.
These drill bits feature a diamond-abrasive coating applied to a fluted core. As the edges wear away, fresh diamonds are exposed, extending the effective lifespan of the bit.
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