$69.99 Bosch 1/2-in x 6-in Round Hammer Drill Masonry Drill Bit for Concrete in the Masonry Drill Bits 
Core Drill Bit Rotary Hammer Masonry Concrete Carbide SDS-Max Power Tool 2-Piece 89634980117 | eBay
ITW BRANDS 11247 5/32x4-1/2-Inch Concrete Drill Bit for sale online | eBay
