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
7.5mm x 150mm - Concrete Screws - Pack of 100
DeWalt Tapper-Pro Blue Hex Head Self-Tapping Screws