I think they were talking about spiral shank nails, not ring shank. It has a twisted grove along the shank of the nail, sort of like an extremely course thread.
I've seen these used to assemble wooden palettes (they are VERY hard to remove). A search on Home Depot reveals they may be used for certain types of siding as well.
I've seen these used to assemble wooden palettes (they are VERY hard to remove). A search on Home Depot reveals they may be used for certain types of siding as well.