Red Head SLDT-3830 Stainless Steel Large Diameter Tapcon 3/8-Inch by 3-Inch Anchor (50 per Box)

They’re 400 Series stainless steel which is magnetic and slightly lower corrosion resistance then 300 series like 304 and 316. However 400 series stainless is harder and better suited for use as a self tapping concrete anchor if they’re not being used around a salty environment they’ll hold up fine outdoors with the possibility of some surface rust. Certain stainless can also become magnetic from manufacturing just because it’s stainless doesn’t guarantee it’s not magnetic. As far as the rough texture on the outside I can’t tell if that’s a coating or scale from the forging process and they definitely drove in well and bit the concrete.

I used this product to attach a 2x12x10 to a masonry wall. It worked very well. Most of the block were hollow

As I now see that other buyers have noted, the product is incorrectly described as stainless steel. It actually is galvanized. $125 for the box which would be expensive even for stainless steel and obviously is outrageous for galvanized.

Product as advertised. Quick ship. Easy install

Picture is nothing like the product. at the very least from buying online you should get exactly what is pictured. I did receive what I purchased but was not pictured correctly . So therefore I downgrade it to one star.

The bolts are galvanized not stainless steel. A magnet sticks to the bolt. That is not possible with stainless steel! Not happy with this seller!