These metal roof fasteners are high quality and work as they should. I replaced old rusted fasteners with these new galvanized screws. I added some where no screws had been installed before and they penetrate 2 layers of metal roof easily. I will purchase again. roofthings.com is a very good company with the lowest cost on metal roof fasteners, I could find.
Reviewed by: Mark W Hutchins from West Virginia on 10/2/2018