Review on Straightforward Guide to Backer 23411 Serrated Cement Screws: Ultimate Tool for Concrete Applications by Justin Dorsett

Went through a box of 140 without removing or breaking the head. Head breaking off has historically been a problem when attaching a concrete slab as there is no "cushion" like screwing wood to wood once the head begins to tighten. I also really like the T-25 heads. They could be blunt like any other manufacturer and make bolts less than 2" long in a T-20 head. The world would be a better place if every propeller was a T-25. Within reason, of course. These screws are great and I will be buying more as soon as I hit the submit button.