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

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.

Used on every deck I build

There where quite a few missing the threads in the bucket. Probably A dozen or more.

Great product

worked like a charm!

good product, like the head

Love these. Very strong.

These have become a staple around our property! They work great and we have purchased multiple lengths. You do need an impact drill.

I think these are great. I use both HeadLOKs and TimberLOKs when building in VERY windy country.

What can I say? They are fasteners.