CONFAST 1/4" x 5" Blue Flat Phillips Concrete Screw Anchor with Drill Bit for Anchoring to Masonry, Block or Brick (100 per Box)

They great and they do the job

Not the same quality as tapcom but the price is a lot better my complaint is that two snapped while screwing them in but 98 of them did there job

These screws work fine on real rock but are useless on engineered stone used on most homes nowadays. I fastened screws tight on my flag mount then a few days later the mount and flag are lying on ground. Screws vibrated/pulled out with a powdery residue left in holes and on ground from the fake stone. If you use these on engineered stone then use anchors. So far so good.

Just finished installing about 50 of these into a poured concrete wall and not a single broken screw. Only two screws "spun out" and didn't grip the concrete, once where I was repeatedly trying to drive it deeper so the head would sink into the wood. The other was a hole where I hit rebar and had some trouble drilling the hole, probably not the fault of the screw.If you are using these flat heads to avoid the screw head from protruding from the wood, you will definitely want to use a countersink bit in the wood you are attaching to the concrete. I went with a slightly oversized half inch bit and it worked perfectly for me. Without it, the head will protrude and trying to force it deeper will cause the screw to spin out as I mentioned above.I didn't try the drill bit that came with the set, instead using a Milwaukee MX4 bit with one bit surviving the entire project.

My husband used these for hurricane shutters

screws good drill bit bad, took forever to drill a few shallow holes. If you already have a tapcon drill bit then these are a cheaper alternative.

I used their hex head for another project, they were great. I needed something to sit flush for this next project. I estimated that I needed 50-60. I stripped the head on so many that I went through all 100, and needed another 20 so I bought Tapcon with their Torx head. It was so much better.If you need flush, get Tapcon. If you can get by with hex these are very much a great alternative.

The screws arrived on time. They worked as needed to install a form around a CMU wall.