$51.99 New England Carbide Concrete Drill Bit Thunder Twist 1/2 Spline Shank | eBay
Core Drill Bit Rotary Hammer Masonry Concrete Carbide SDS-Max Power Tool 2-Piece 89634980117 | eBay
Shop DEWALT 1/2-in x 6-in SDS-Plus Masonry Drill Bit for Concrete at Lowes.com
