20, 7.5 Ø x 150mm Concrete Frame Fixing Screw - Window/Door/Screws with Free TORX 30 BIT with Every Order - Free UK DELIVERY : Amazon.co.uk: DIY & Tools
Persuade me to use or not use these concrete screws in brick for skirting : r/DIYUK
Hi-Lo Thread with 3 Notches Flat Undercut Head Torx Drive Concrete Screw - China Concrete Screw, Window Screw | Made-in-China.com