$64.99 Steel Dragon Tools® 1-1/2 (38 mm) x 6 Dry Diamond Masonry Core Drill Bit - Walmart.com
IVY Classic 10332 1/2 x 12-Inch Premium Carbide Masonry Drill Bit, 3/8-Inch Reduced Shank, 1 
Amazon.com: 1-1/2 X 12 Masonry Drill Bit: Industrial & Scientific
