EDiamondTools 4-1/2 in. Dry Diamond Core Drill Bit for Brick and Block, 9.5 in. Drilling Depth, 1/2 in. Chuck Pilot Bit Adapter DBP0412A5ADJ11 - The Home Depot
Pro-X-Tile Drill Bit Diamond Core (1/4in 5/16 in3/8in 1/2in) 4pc Set | Lowe's Canada
Coring drill bits, diamond impregnated bits for core drilling
2.5" Inch Diamond WET Core Drill Bit 1-1/4” Threaded by BLUEROCK Tools for Concrete Rebar Asphalt Brick Rock Masonry Hole Barrel Coring 2-1/2" - Amazon.com
Thread Diamond Core Drill Bit 31-51mm for Tile - Tilemaster