$56.99 Amazon.com: 1-1/2 X 12 Masonry Drill Bit: Industrial & Scientific
Whirlwind USA CPB 3-1/2 Inch Wet Premium Concrete Diamond Core Drill Bit for Con - Marble, Tile 
EDiamondTools 6-1/2 in. x 14 in. Wet Diamond Core Bit for Concrete and Masonry-WBP0612A4 - The 
