$65.99 Tapcon 1/2 in. x 10 in. SDS-Plus Drill Bit-11495 - The Home Depot
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 
