FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count,Black

I used these screws to secure 1x4 furring strips in a rain screen design on the exterior walls of a new construction house. The work great for that purpose and I am confident in their being able to hold up over the long term. My guys were driving them through the 1x4s, 2 of foam board, 1/2 plywood and into 2x6 studs with a 1/2 cordless drill but I would suggest an impact driver or pre-drilling the holes for a much easier time and mush less splitting of the 1x4s or 2x6 studs.

I love them. Im a carpenter. I build decks. I use these anywhere code allows. They hold really good and when visible, they are easy on the eye. They are treated lumber and cedar friendly. They dont corrode or stain. In most cases, you dont need to pre-drill. Ive used them in a lot of different lengths ranging from 2 7/8 up to 10. One word of advice, you do need an impact driver, a regular drill-driver wont drive these.

They worked great.

Used to build a deck, these things literally saved the day, Ill continue to purchase these for any large wood project that I have to work on where full support is needed/required (deck footers/stairs/railing). Awesome product at a decent price (fairly expensive, but time saving).

Great product! Already wrote review on 2 7/8 same results luv them.

good product, like the head

Used on every deck I build

Great screws for attaching furring strips through continuous insulation sheeting on house exterior to studs. Only issue is that if they didnt give you three bits for the spider drive you may be out of luck because my impact broke the first bit about half way through. But since they give 3 bits you should be good.

These things, in any length are great, work well and hold awesome!!!

Came with three 6 point star bits instead of an 8 point for some reason, had to go buy another set of bits. Worked well for my application other than that.