Tapcon 1/4-in x 1-1/4-in Concrete Anchors (8-Pack) in the Anchors department at Lowes.com
DeWalt DFM12742 Ultracon+ Series Concrete Screw Anchor, 3/16 Inch By 1-3/4 Inch Carbon Steel, Zinc Stalgard: Concrete Anchor Screws - Flat Head Up To 1-1/2 Pounds (075352317021-1)
Blue-Tap Concrete Screws Flat Head (1/4" x 1-3/4") White - 100 pcs - Florida Fasteners Direct
Blue-Tap Concrete Screws Hex Head (3/8" x 3") White - 25 pcs - Florida Fasteners Direct
8 Tips for Drilling Concrete and Installing Fasteners | Family Handyman
Concrete Screws - Hex Head
The complete guide to concrete screws
Concrete Screws - Flat Socket Head – DecksGo
Tapcon 3/16 in. x 1-1/4 in. Hex-Washer-Head Concrete Anchors (75-Pack) 24300 - The Home Depot
Hex Head Concrete Screw Masonry Anchors - 1/4 x 3-1/4 Qty-100: Concrete Screws And Bolts: Amazon.com: Industrial & Scientific
Tapcon 2-3/4 in. L Star Flat Head Concrete Screws 75 pk - Ace Hardware