Buildex 100-Count 1/4-In x 2.75-in Blue Steel Self-Tapping Concrete Screw | Lowe's Canada
Generic MasTek Self-Drilling Concrete Screws 1/4 x 3" Steel Tungsten Carbide Tip (15PK)
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
8 Tips for Drilling Concrete and Installing Fasteners | Family Handyman