Hex Head Concrete Screw Masonry Anchors - 1/4 x 3-1/4 Qty-100: Concrete Screws And Bolts: Amazon.com: Industrial & Scientific
MasTek Self-Drilling Concrete Screws 1/4 x 3" Steel Tungsten Carbide Tip (15PK): Amazon.com: Industrial & Scientific
Concrete Screw for use with Multi-Use Anchor (1 Pack)
Post Concrete Attachment Hardware - Tapcon Screws
8 Tips for Drilling Concrete and Installing Fasteners | Family Handyman
Hillman 1/4 in. x 2-1/4 in. Blue Flat-Head Phillip Concrete Screw Anchors, 15-Pack at Tractor Supply Co.
CONFAST 1/4" x 1-1/4" Concrete Screws 410 Stainless Steel Hex with Concrete Drill Bit for Anchoring to Masonry, Block or Brick (50 per Box): Amazon.com: Industrial & Scientific
Types of Concrete Anchors and How to Use Them - Pro Tool Reviews