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Title: Pretty much rubbish
Review: I really wish I had paid more attention. "Cobalt coating" is a non-existent foolishness, but all I saw was the "cobalt" part. It's not clear what these drills are made of, but it ain't a cobalt steel alloy.Almsot all the number drills are sized wrong, and the several smallest are all the same incorrect diameter. Not serious tools.Beware. Only the index box is worth having, but it's a pretty expensive box at 60 bucks.
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