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Those will be fine for doing small jobs.
Not sure if either will work with Hilti brand bits. I find they last longer that the Bosch or generic bits.
If I was busting up a lot of concrete, I would go with a small electric jackhammer from a rental agency or look for one on Craigslist or Kijiji.
I have used a Hilti drill to drill concrete every six or eight inches along the break line then just used a sledge hammer to bust up everything I wanted gone.
__________________
Bill K.
"I started out with nothin and I still got most of it left...."
83 911 SC Guards Red (now gone)
And I sold a bunch of parts I hadn't installed yet.
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