Very happy with these drill bits, they have exceeded all my expectations. They are much sharper than my other Milwaukee, Bosch or DeWalt bits and make very clean holes in sheet metal very quickly and with very little pressure. Can't speak to their durability yet but so far they are working fantastic after drilling 50 holes in 26g galvanized sheet metal almost day and night unlike what I'm used to from bits from major tool manufacturers. I don't have high end professional machine tools so I can't compare them to the best products, but these products are also usually extremely expensive and outside of the price range for most everyday applications. A small issue is that the bits are a bit loose in the plastic holder they come in. So there needs to be a safe way to store the bits and holder so they don't come loose in a tool bag or box, but that's a minor thing as the bits themselves are more than adequate for the price.
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