$65.99 2-1/2 Inch Diamond Wet Core Drill Bit For Concrete, Brick, Masonry,and Block With 1-1/4-7 
New Drillpro 32mm/42mm 1/2 Inch Square Driver Firewood Splitter Drill Bit for Impact Wrench 
how to drill a 2 inch hole in concrete - Concrete Information
