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
Buildex 25-Count 1/4-in x 1.25-in Blue Steel Self-Tapping Concrete Screw | Lowe's Canada
Prithivi Concrete Screws, Size: 8mm To 20mm
HWF Ruspert Concrete Screws - Anzor Fasteners
Self Drilling Concrete Screws | From Screw Factories-Prince Fastener