Core drills can put big, precise holes in concrete and stone, without the vibration of a hammer drill which could damage the area around the hole. This wet core drill from Flex also helps to contain the mess, provides cooling, and advances faster. Street pricing starts at $785, so unless you need to drill a lot of holes in really pretty stone, you might want to rent — especially since bits, which come in sizes upwards of 10″, run $50 or more for the small ones. So if your going to go that route, use eReplacementParts.com as a good resource on bits and tool parts.
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