#30/40 diamond grit, designed for drilling hard concrete, masonry, hard brick, granite, and other hard materials - Diameter: 4 inches - Thread: 1-1/4"-7 threaded - Drilling depth: 14" - Drilling method: WET only

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#30/40 diamond grit, designed for drilling hard concrete, masonry, hard brick, granite, and other hard materials - Diameter: 4 inches - Thread: 1-1/4"-7 threaded - Drilling depth: 14" - Drilling method: WET only

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