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The movie plots have them breaking up the concrete with jackhammer type tools, which makes a lot of noise. This was taken out in three plugs with diamond rimmed hole saws. I've seen 8 inch in use and I'm sure they make much bigger. It's not all that noisy, but takes a lot longer, and they require water for cooling and to wash the cut dust out. I have several half inch ones for drilling glass.
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The descent of man ~ Nixon, Friedman, Reagan, Trump.
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