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
Concrete Screw Bolt 12mm x 75mm | Enforcer Group
75mm X 12mm Galvanised Concrete Screw Each - The Bollard Shop