WENDY'S PREMIUM MINIS
The Wendy's discs appear to be the same mold family as used by McDonald's, Cosmic Candy, Post Cereals, and others around 1980, but they didn't have raised letters. 3.5" diameter.
The Fun Flyers were a limited number in-store give-away when buying any size Frosty at "Wendy's GET A FRISBEE DAY" in August 1981. 3.5" diameter.