Review on 🔧 Hard-to-Find Fastener: Phillips Head (Part #014973211714) by Phillip Hoover

They have just been used in a concrete slab, after drilling the right size hole they worked perfectly. My only issue is that the blue coating on the screws was quite thick on several (I had three unusable) screw heads, which prevented the screwdriver head from pushing far enough to tighten the screw well, it started to tighten, but once you do that When proper torque was needed, the bit began to slip in the screw head. Most of the screws were different and worked great. I wanted to use all of these screws for my project but unfortunately I couldn't use them.