$54.99 ITW BRANDS 11247 5/32x4-1/2-Inch Concrete Drill Bit 92097112476 | eBay
Hitachi 1/2-in x 36-in SDS-Max Drill Bit in the Masonry Drill Bits department at Lowes.com
New Drillpro 32mm/42mm 1/2 Inch Square Driver Firewood Splitter Drill Bit for Impact Wrench 
