Rhino
Super Moderator
Bear in mind, that life rings vary in diameters & thicknesses. I think the featured P/E ones a little under-scale for Patrol/Rescue vessels. They would be dandy for Commercial/civilian use. To attach, use a dab of Future, slide the teeny ring on and leave it alone! C/A glue overpowers little details like these.
This one is double punched from plastic card. I punch the center hole first, then center & punch the diameter.
These I like for the bulkier rings a Man might toss a ways during a rescue op.
Does that help?