CONFAST 1/4" x 3-3/4" Hex Head Concrete Screw Anchor with Drill Bit for Anchoring to Masonry, Block or Brick (100 per Box)

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.

Super impressed by these! I’ve gotten so much use out of it and made a lot of money from it too. I’ve used these two install downspouts for gutters, I’ve also used it to install vents for dryers on the outside. These guys have no issue going through the material. I would recommend First doing a Masonary bit to go through the area, you are going to be securing, once you’ve done that, though, this guy has no problem and it bites really well. Many other screws seem to not hold very well and eventually come right off the wall. These guys are awesome.

These were so much cheaper than the Tapcons at Home Depot I decided to give them a try. The bit that comes with the package worked okay for about 6 holes in mortar and then it became so dull as to be useless. Found an old Bosch bit in my toolbox that finished the job. Also during install I had one head break sheer off the screw anchor when it was torquing down. Rather than try to extract the broken anchor I just plugged the hole with some caulk and drilled another hole. Never had this happen with a Tapcon.

Good brand works well

We use about 50 a week and maybe I've broken the head off of 3 of them in the past 4 months. Honestly, that's most likely only because my guy was using too much tork with my impact driver. Going full throttle while the thing is already set. Yea, they might break then. If you know how to use a drill. You shouldn't have an issue. These are good screws. Much better than buying 15 for the same damn price at my local hardware store.

The screws are as good as any blue masonry screw I bought and used 400 in total and everyone of them worked as designed they are durable and hold. As for the drill bit it is also as good as any standard masonry drill bit no one should ever Expect a standard Masonary drill bit to drill 100 holes so do yourself a favor and buy a 10 pack of drillbits and a nice Hilty or similar Masonary impact driver and all I’m extremely happy With the product I will buy more if needed for a future projects

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.

Had 17 to drop into 6 total 16x16x4 precast cement blocks. Didn't use the bit that came with the screws because I have an SDS hammer Drill. Using a 3/16 x 6" bit that I marked at 3.5" pre-drilled the holes to 3.5" ea. of the 17 screws dropped into the 4" blocks, 3 of screws heads snapped off long before the screw could have bottomed out. Ended up having to drill 6 more holes as I had to move 3 of the 2 hole brackets in order to ensure the fencing structure was properly anchored. Compared to Tapcon, they are slightly less expensive for a similar quantity in my experience, but also slightly less durable. Perhaps quality control is less stringent, so If you hate having additional unwanted holes in your work projects, you should probably consider another brand. If the holes won't be visible and you can afford some errors, then these will work just fine.

These screws are heavy and high quality. The hex head makes it easy to drive, and a 3/16" masonry bit was the perfect pilot. However, I want to take 1 star off because unlike the description, these screws did NOT include a drill bit.

avevo già utilizzato negli stati uniti con risultati buoni,ottimo se si usa con tasselatori vibranti e non impulsi ,ottimo per fissare profili pezzi che richiedono viti continue senza segnare togliere e forare

En las especificaciones RECOMIENDAN utilizar broca de 3/16" sin embargo a mí no me funcionó así, quedaban bailando con tornillos, tal vez por el tipo de material, lo mismo ocurrió con los TAPCON, ambos incluyen sus brocas pero no logré el efecto deseado por lo que decidí ir por una broca más pequeña. En este caso ocupé una broca SDS de 5/32" y el efecto logró ser el esperado, algunos tornillos siguen girando al llegar a tope (por extracción saldría con mucha facilidad) con esta combinación de broca y tornillo quedó muy sólido.

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

Works well. The provided masonry bit was great quality.