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When drilling anchor bolts we use hammer drills with SDS bits. As was mentioned, when drilling, be sure to stop occasionally and vacuum out the holes( a shop vac with a narrow tube taped to end works well). A quick cheat, determine the depth required, measure bit, and install electrical tape at the correct depth on the bit so you know when you get the correct depth.
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Eric
83 911SC/83 944
bunch of Honda 750s
69 Chevrolet C-20 Longhorn (family heirloom)
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