VGBUY 1/4×1-1/4 Inch Hex Head Concrete Screws, 70PCS Screws Anchor with Drill Bit, for Masonry, Block, Brick, Cement, Stacoo, No Pre Drilling, Diamond Point : Amazon.co.uk: DIY & Tools
Tapcon Concrete Screws
VGBUY 1/4×1-1/4 Inch Hex Head Concrete Screws, 70PCS Screws Anchor with Drill Bit, for Masonry, Block, Brick, Cement, Stacoo, No Pre Drilling, Diamond Point : Amazon.co.uk: DIY & Tools
MasTek Self-Drilling Concrete Screws 1/4 x 3" Steel Tungsten Carbide Tip (15PK) : Amazon.co.uk: DIY & Tools
Concrete Screws for Projects - How to Fasten Anything to Concrete