FastenMaster FMHLGM412-50 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 50-Count

...and a retaining wall of pressure treated 6x6 lumber. The result is so solid I know I wont need to redo it in the future.

These screws are GREAT... good quality, nicely painted black, and as the head is flat, it nearly disappears once installed. They come with the Driver bit, so no need to look for one. Very happy, to the point that Im using this in various other projects.

I received an opened, damaged box with 1 screw missing. All in all, it could have turned out worse. It isnt like there was anything wrong with the other 49 screws and I suppose Im lucky it came with the required and proprietary bit, but I was probably one shake away from receiving an envelope bag of screws instead of a box of them

EXCELLENT

Work as designed. Very durable. Had to take apart the steps I was building a couple of times and the heads did not strip out. Would buy again.

Use these screws extensively on a deck. Biggest plus is the flat head.

Screwing up through the top plates is much faster than those damn hurricane clips; plus it puts the uplift force closer to the plywood face where it belongs. Brilliant yet simple innovation here.

Table making .

I was recommended to use these by a friend. After seeing the price, I was a little hesitant, but figured Id try a box out. Wow! I love these screws and they leave me feeling like my builds are secure and stable. Very nice head that allows for the screws to be driven in to wood without stripping the product. I also like the wide head, which allows me to pull my materials in tight without blowing through the lumber or splitting it. I strongly recommend these screws if youre building and want a secure joint.

works great, so much better then using bolts when building a deck