As suggested get the best bit you can afford, Hilti makes a good one and so
do some others. I have 10 Hilti bits that are over 20 years old. They work
fine. Nothing like a TE-52 to make easy work of concrete, or setting
1" is starting to get up there. If your doing concrete get a heavy
rotohammer, 2 hands. If your doing block then it will not matter much unless
you hit a bond beam.
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