I have two sets of Rings, one a gift from a friend who found them at a magic swap meet, and one that I purchased at a bargain from a retiring magician friend. Is there any way to tell who made them?
Although I don't have both of them in front of me at the moment of this writing, I think both are 8" sets. One of them is considerably heavier/thicker stock than the other, and its gap much wider than any I have ever seen.
Both sets are solid core.