Tapcon 1/4" x 3-1/4" Star Torx Head Concrete Anchor Screws 3191407V2 | 100 Pack | Drill Bit Included

Worked perfectly

They seem like the name brand or good enough clones I can't tell the difference. These 3-1/4" ones are exactly what you want to attach 2" dimensional lumber (actually about 1-1/2" thick) to concrete and have the screw heads pull down flush into the wood rather than sticking up. Strangely enough the local hardware stores all sell 2-3/4" as the longest you can get with these normal heads (called "bugle head") and any longer they switch to a big flat head that stays against the outside of the wood and remains proud. 2-3/4" ones can work if the wood is perfectly flat against the concrete and you don't overdrill or wobble out the hole at all. Any slight deviation and you'll find a frustrating failure rate with 2-3/4" tapcons going through 2" dimensional lumber. These are MUCH better and have enough extra length to cross a small gap and pull the board tight as anything. I've put in almost the whole box with every single one holding strong. I didn't use the included drill bit and didn't even check if there was an included torx bit. Both of which are better if you buy separately. I found great success with generic concrete drill bits here on Amazon. The ones that are included with tapcons are trash and will frustrate you.

Generally works as expected but I did twist one off attaching a pocket door frame to our basement floor.

Drilled and put approximately 85 screws into very old concrete with non stripping. Will definitely purchase tapco again. This is my first review of any product.

Original Tapcons for a good price.

It's a screw. And the quality is good. You can't get a good screw in Panama. Imagine having to order one through the mail! But hey, we all know, a good screw is so worth the effort. You just have to try a lot of bad ones before you find one that can really do the job.

Anchor solid with the included drill bit.

The tapcon products work great, but I only received 90 fasteners in the box, where there should have been 100 in the box. The drill and driver were included as advertised, just was short exactly 10 fasteners. Not sure why there was a shortage. The fasteners themselves are great!

A good price point!

I like the Torx drive, works well no slip when driving. The drill bit cuts well and lasts a long time. One thing to be cautious of, if the anchor is getting too tight to drive you may need to clean the hole again. I sometimes go in and out to help with cutting the threads in the concrete. Make sure the hole is deeper than the screw this will leave some room for material that the screw loosens. If the hole is too shallow the screw bottoms out and snaps off while driving

The box that I received was already an open box. So, I started to count the concrete screws. There were 99 in the box and not 100.