Wet Drill Core Bits for Drilling Hard Concrete, Concrete with Light Steel, Hard Brick, Granite, Bluestone, Quarry, Slate, Tarmac, and Other Masonry using #30/40 Diamond Grit

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#30/40 diamond grit, designed for drilling hard concrete, masonry, hard brick, granite, and other hard materials Multiple sizes available 5/8"-11 or 1-1/4"-7 thread 12" to 14" drill depth Drilling method: WET only

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