$62.99 Bosch 1-1/4 in. x 31 in. x 36 in. SDS-max Speed-X Carbide Rotary Hammer Drill Bit for Concrete 
Archer USA 1-1/4 in. Diamond Core Drill Bit for Concrete Drilling-CB1250 - The Home Depot
concrete core drill bits up to 12 in â Universal Rent It All
