CONFAST 3/16" x 1-3/4" Blue Flat Phillips Concrete Screw Anchor

I always used Tapcons and boy have they became pricey! I never heard of Vinfast before but a quick search it's been in business for decades and is based out of Ohio, so say no more, the drill bit worked just fine for me, I drilled over 25 holes with no issues using a proper hammer drill, I had 1 not screw in but tbh I think I drilled a little off on that one, works just as good as the tapcon and tbh I feel like the coating is a bit nicer than the Tapcons, regardless this will be my new go to screws!

Great product at a great price. No guessing on the drill bit size, it comes with it. Grip is just as good as TapCon.

I am in a process of finishing basement and one part is about attaching subfloor panels (dricore) to basement floor. Every other panel on the perimeter must be screwed in. I tried 3/16 screws of different manufacturer and they did not work at all. They kept breaking. Those work great, will go in and hold tight. However, the drill bit was a disaster. It lost the "spade" tip after drilling two holes. Actually, the 2nd hole was not even finished. I ended up buying some other one (almost 1/3 cost of the screws!!) and now the job is moving. So, if your screws gets stuck or go too tight, check the drilling bit.

These are good screws. Has good grip and it did the trick. Make sure you use the correct bit. I didn't use this bit because I used a SDS plus to make a hole before using these screws.

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.

Very nice masonry screws! I was able to fasten some shelves and a water filtration system to my cement basement walls! The included drill bit works very well and makes installation a breeze! Very good quantity for the price as well!

The screws are great, but the drill bit is crap. I trued using it, but it couldn't drill into concrete wall, so I had to grab my own drill bits. The screws work fine though.

I was tired of paying a lot of money for 6-10 of these every time I needed them. Thought I'd give these a try and they work wonderfully. I had none break and they were perfect for my use.

It is very strong and works excellently.

These screws are great when you use a 7/32 drill bit. I ruined a couple trying to use a 3/16" one.

Priced less!,,,,

Not so good.. screw dont grab to concrete.. teeths on the screw seems soft.. Also dri vit that came in was bended.(not straight) Go buy known brand dont wast time and money

Es lo que esperaba