$67.99 Amazon.com: ITW BRANDS 11247 5/32x4-1/2-Inch Concrete Drill Bit: Home Improvement
LOT OF 4 - BOSCH BLUE GRANITE TURBO 1/2 CONCRETE DRILL BIT 12 LONG | eBay
Bosch 1/2 in. Multi-Purpose Tungsten Carbide Drill Bit for Drilling Tile, Masonry, Wood, Metal 
