Ankr-TITE ATS Wedge Anchor, 304 Stainless Steel, Meets QQZ-325Z Type II Class 3 and GSA FFS-325 Group II Type 4 Class 1 Specifications, 1/4" Diameter, 3-1/4" Length, 2-1/4" Threaded Length (Pack Of 20)

Worked great mounting my new Cedar Gazebo on my patio!

Was able to find what I needed online when I couldn't find them at Lowes or Home Depot.

The wedge portion is a few thousandths over .375 (3/8) so most were somewhat tight and needed to be hammered in the concrete. I've used similar wedge bolts previously and these were noticeably difficult. Several of the nearly 20 I installed on a recent job were quite stubborn but did function. Since these are stainless I suppose they are harder than regular Grade-2 steel bolts. I also used 2 different high quality masonry bits, Bosch and DeWalt.  Bosch HCBG12 Blue Granite Hammer Drill Bit Carbide Tip 3/8 x 4 x 6-Inch  & DEWALT DW5230 3/8-Inch x 6-Inch Carbide Hammer Drill Bit

I needed to erect several stainless posts with flanges onto concrete to hold glass panels for a safety railing. It is on a second floor patio and I needed to ensure this railing was sturdy and secure. I tried several home depot options including some that you pound in with large nails and also plastic and lead plug, but these were all too light duty. Most simply broke. These anchors are stainless like my railing so they are compatible materials. One year later and through a rough winter they are still holding this heavy rail ROCK solid. No wobble. I recommend them if you are doing serious construction that needs to last.

Stainless steel works great outdoors

Very high quality. These were hard to find locally (plenty of non-stainless options, but I prefer SS bolt-anchors for exterior use). Well worth it and work flawlessly (be sure to follow instructions regarding drill bit size, hole depth - and preparation).I used four of these to secure a heavy patio umbrella base to our 40 yr old poured concrete seating area around our pool.

Of the twenty anchors in the box, one did not have threads and is useless. Because I ordered them with plenty of lead time, I now find that the return window has closed. In the future, if I order Wej-it anchors again, I will be sure to take them _all_ out of the box and inspect them carefully. If the company wants to do the right thing, they will send me a replacement. If they do that, I will revise this review and even return the unthreaded anchor for their inspection.

Stainless steel is a must have for outdoor anchors. I fastened my pavilion down with these.