Pack Of 100 Dewalt DFM12726 1/4” X 2-3/4” Tapcon Type Masonry Concrete Screws | eBay
DeWalt DFM12700 Ultracon+ Series Concrete Screw Anchor, 3/16 Inch By 1-1/4 Inch Carbon Steel, Zinc Stalgard: Concrete Anchor Screws - Hex Head Over 1-1/2 Pounds (075352317304-1)