Screwfix – Ideal for fixing uPVC and timber frames directly to masonry.
Flat Countersunk Head with 5 x Locking Ribs
Deep High/Low Thread for High Pull-Out Resistance
Self-Drilling
Suitable for Both Domestic & Trade Use
Heat-Treated
Zinc & Yellow-Plated
https://www.screwfix.com/search?search=EASYDRIVE+CONCRETE+SCREWS+
Post time: Jun-12-2017