4 inch Diamond Core Bit for Reinforced Concrete Wet Coring/Drilling, 14" Length
8" Inch Diamond Wet Core Drill Bit 1-1/4” Threaded by BLUEROCK Tools for Concrete Rebar Asphalt Brick Rock Masonry Hole Barrel Coring: Amazon.com: Tools & Home Improvement
Wet Diamond Core Drill Bits for Concrete and Stone - 4" Diameter 1-1/4"-7 Threaded - Walmart.com