CONFAST1/4" x 2-3/4" Hex Head Concrete Screw Anchor with Drill Bit for Anchoring to Masonry, Block or Brick (100 per Box)

Work great.

Great fasteners, however, buy a good 3/16” concrete bit. The one included is terrible.

Great value for these bolts that I could not find at any stores in my city.

Very happy with the screws. They’re tough and withstand the high torque I’m putting on them. The included masonry bit was a nice feature but I broke it on the third hole. Bought a $10 Bosch bit from the hardware store and drilled out the remaining nine holes with ease.

Bought these 2 weeks before hurricane Ian hit because I had a bad feeling about hurricane season. Well unfortunately I was right and we were hit by hurricane Ian. On the day of the hurricane it made a turn toward Fort Myers and we needed these to put up our plywood. These all worked perfect and held through the storm. We only broke 1 screw off while mounting the plywood but that was my fault for not setting the clutch on my drill on the first bit. Every other screw went in like they should and came out the same. I highly recommend these anchors as they didn't let us down. All windows were protected. Too bad I can't say the same about our roof but these screws had nothing to do with that loss.

I used this to repair a corner pop on my foundation. The original material was lost so I had to form a new one. I used this anchor screw to provide support for the new corner. I drilled into the old concrete, added in an epoxy for anchors, placed the screws tightly, let it dry, setup a form, then troweled in the new concrete. Repair looks good (professional even), and seems very stable (time will tell).To determine the correct size, you need to decide how deep the screw will be set. I wanted mine sticking out by 1.5 inch to act as rebar for the concrete, and drilled about 1.25 inches deep into the existing foundation, so I used 2.75 inch long screws. If anchoring other material, then consider it's width plus the depth you want the screw to be drilled. Be sure to use an anchor epoxy for a permanent fix.A note about drilling the holes for these screws: There are a LOT of drill bits advertised as good for concrete, they aren't. You need a fairly long bit (longer than the length of the screw to be set in the concrete) and it needs to be a REAL CONCRETE DRILL BIT - like the "Bosch BM5000 Fast Spiral Masonry Set". You must use the correct bit width or you can damage the concrete (if too narrow a bit) or the screw won't hold (if too wide a bit). Length is really difficult to get right if you are working in a confined area, so take that into account. If you have a wide open work area then you need to determine how deep you want to set the screw and be sure you have a slightly longer bit - put a piece of tape on it to show how far in to drill and when the tape aligns with the concrete you stop. If you have a really confined area like I did, you need to also determine how much extra bit you need to fit into the area to even reach the drill drill point (I could get the drill about 2 to 3 inches away from the drill hole and no closer). This means you have to add that much to the overall length of the bit for your project to work. Finding long enough masonry drill bits can be a real problem.

I didn’t receive a drill bit

You won't find this length in a box store, which is why I purchased online. The plus is the screws work just as well as tapcon screws which depending on your concrete is mixed. If its soft it will strip out if torqued to much and if its really hard you might snap them while seating the head. I had decent success in fully cured foundation wall some I had to finish setting with my hammer but still has hold. Only real complaint is it should come with a couple bits mine worked good first 20 holes but got dull in hard concrete, good luck finding a bit this size. I had to put the boards up drill with shorter bit and remove to finish holes to get required depth. My advice see if they sell extra bits and buy a few more but good buy on the screws.

These screws are fantastic. No plugs to come out at some fateful day in the future. Simply drill a hole and screw them in. And forget. I recently removed some of these screws, from an open air environment, that they'd been in for some twenty years. They came out with the ease that they went in, and virtually free from any rust or corrosion. The screws being in a fit condition for use elsewhere. Being hexagon head, they're very robust against insert tool damage, unlike the Philips equivalents.

The screws themselves are decent - they hold pretty well and tap in fairly easily. The large socket head makes them easy to drive, although would need to be counter sunk manually if you don’t want them to stand proudHowever the included bit is utterly useless - mine twisted ridiculously when halfway through the first hole I tried to drill, and the concrete I was fixing into was not even particularly hard! Fortunately I had another bit of the same size, and could continue with that...If you buy this, I recommend also buying another high quality bit

As long as you are careful choosing the correct drill, then these screws are superior to screw and plug.

bought two different sizes of these to fasten into breezeblocks. Neither size would take a hold, ended up having to raw plug and use screws.

These thinner ones tend to snap under the strain of an impact driver. I suggest purchasing the slighter thicker ones instead. They work excellently. Don't forget to push forwards hard as you drive them in.