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I have a concrete wall with stone slabs on top, I want to drill into the stone slabs to attach a fence, they are around 2 inches thick, can I use a hammer drill or will this crack the stone?

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  • A hammercdrill might loosen the stone cappings…
    – Solar Mike
    Oct 10, 2021 at 18:42
  • Do not use a hammer drill on the tile surface, you are risking to break it down. Use a small drill bit to make a pilot hole, then enlarge the hole with a larger bit. Just need patient when dealing with fragile materials.
    – r13
    Oct 10, 2021 at 21:51

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Assuming the fence posts need a hole bigger than about half an inch (probably more like 2 to 8 inches) and you want a clean round hole, use a diamond core bit not a hammer.

A "hammer drill" (the kind that vibrates when you lean on it) will help you make small holes in stone, suitable for screws but not for a fence post. A more powerful rotary hammer on a thin slab might break it in half.

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  • Oh, excellent point!
    – FreeMan
    Oct 11, 2021 at 12:34
  • A possibility is a granite counter top installer . They can cut hoes in granite of any size but it would cost money and I do not know how willing they are to make a house call. Oct 11, 2021 at 15:48
  • I've seen the counter people do it. An ordinary drill and a $50 core bit gets through a countertop. There is some skill involved in starting it in the right place without dancing the bit and scratching up the counter. I wouldn't attempt it on a $1000 countertop myself. But if it's stone tiles that cost $20 I'd buy the bit, maybe buy a couple of slabs to practice on, and go at it.
    – jay613
    Oct 11, 2021 at 16:33

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