Storeguard drive Nails. These are For roofing. To be used on aluminum, galvanized and Or fiberglass. They are true to their word. They are not rusted. They are over 50 years old and they still look pretty good. They have a washer around the top I'm not sure why. They say that they are greatThey say that they are 10 gauge With 7/16" head. 5 pounds came in a Box and sold for .75, 50 years ago. I don't think my husband's father used hardly any at all but they have been in the storage forever. And they look like new. because they were Made in the USA We used to make good stuff. Anyway I can't sell them to you for 15.75 because of inflation. That's how much it's gonna cost me to probably ship it but we could start it at auction at 99 cents.