DPT 1 7/8 Inch Wet Diamond Core Drill Bit Hole Saw for Concrete and Asphalt, 1-7/8" Diameter x 16" Length - Amazon.com
VEVOR Dry Core Drill Bit, 4.25"/108 mm Diameter 5/8"-11 Shank Arbor with a Pilot Bit & 4.5" Blade, 9.5"/241.3mm Depth Diamond Coring Bore Tool, Masonry Hole Saw Bits for Hard Concrete Brick
Archer USA 2.5 in. Diamond Core Drill Bit with V-Tip for Concrete Drilling VB250 - The Home Depot