DEWALT DW5424 - 5/16" Rock Carbide SDS Plus Shank Masonry Drill Bit - Walmart.com
Amazon.com: 7 Pcs Masonry Drill Bits, Concrete Drill Bit Set Tungsten Carbide Tip Work with Concrete, Stone, Carbide Drill Bit Set for Glass, Brick, Tile, Plastic, Ceramic and Wood Size 1/8 to