Used these for a fence project where I was able to use so existing concrete. Very strong and reliable, ran out and used some other anchors - they didn't feel as sturdy so I bought more and of these and delayed my project. Worth it in my opinion. They are expensive though....but again worth it for my use case in which I needed reliability. Takes a little more effort but again, more durability. Recommended.
GRK 11420 Tapcon Concrete Screw Anchors 1/2" by 4", (10per Pack)
