hard learned lesson: premo drill bits are worth the price. Better steel, better grinding, etc. For regular bits -> https://www.amazon.com/DEWALT-DW1361-Titanium-Pilot-21-Piece/dp/B004GIO0F8 … https://twitter.com/jkrwld/status/831211003228590080 …
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9/ you can, in a technical sense, sharpen the bit 2" further back...but it won't hold the edge at all. So don't bother.
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10/ Not surprising. Drill bit are actually fairly complicated tech: precise nose angle, precise relief angle,https://twitter.com/Octapode/status/831212368646529024 …
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