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31 Posts
Discussion Starter · #1 ·

Is there any benefit to drill bits for metal & wood having a coating? I want bits that stay sharp for a while, I do have a drill doctor. I see bits with Tin coating, cobalt coating, titanium coating etc. Do these coatings help, or are they just a gimmick?

Are there manufactures of quality drill bits ,if so, who do you recommend? Thanks Much

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