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[–] 104 points 6 months ago (3 children)

At this point it seems likely they have at least one dull drill bit.

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  • [–] 12 points 6 months ago*

    Carbide/diamond rotary hammer bits don't really "cut" as much as they turn concrete into to dust a little bit at a time. Interestingly, that dust then help to abrade any steel you might encounter along the way.

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