Negative Positive
Title: good
Review: They worked for finishing holes in my wheel hub on my 1997 volvo 850. I used ceramic bits to drill most of the way through my well hub then once the tip of the bit started to exit the other side, I finished the holes with these cobalt bits to avoid shattering the ceramic. One bit was good for two hole finishings. I bought some cobalt bits from home depot that were destroyed before they could finish one.
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