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

These are very good quality and the enclosed drill bit work great. Very easy solution and I liked the hex head on the screw better than a traditional slot head. Very nice to have either option in one screw.

We normally purchase these from our local hardware store - and these were perfect! Quick shipping and more reasonable pricing! Also came with the drill bit needed, which worked wonderfully.

This is a good masonary screw. It works pretty well if you pre-drill the whole. The only negative I have is they break easily if over torqued. So, be careful when tightening!

Great concrete screw anchors. Did the job they were suppose to do.

They do what they should, they’re screws.

I liked the bit came witn

comes with the correct drill bit , used them to install pt plate to concrete.

In the past, I have used similar screws of another brand in block walls and other masonry with good results. I bought these to attach framing to a poured concrete floor in my 70 year old house. Using the provided masonry bit and my hammer drill, I had no troubles drilling pilot holes in the concrete. However, most screws would not go all the way in before either breaking or rounding out the head on the screw. So, while they may be a great product for other types of masonry, they are not a good product for well hardened poured concrete.

Works well. The provided masonry bit was great quality.

Had no trouble with the screws however the included bit was too short.

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.

I planned on using these screws to drill into concrete. I didn't use the included bit but my own 5/32 SDS bit to predrill the holes. I then used a cordless drill to screw in the fastener. On the first screw the head broke off. I thought maybe it was a bad one so I tried another screw and the same thing happened. I switched to a lower power drill and went at a slow speed and the screws kept breaking. After drilling eight holes and having eight screws break I gave up. I had a few Tapcon screws left so I used them with no problem. Not only are these screws poor quality they are dangerous if you plan on using them for anything that you don't want falling down when the screw snaps.

Cuando compras la caja deberían ofrecerte la medida de broca y el dado, cuando habrás la caja tener cuidado de pincharse. Solo he puestos una base para la manguera quede muy contento