I would have guessed they are gauges of some sort (for metal rods or wooden dowls) that also determined how straight they were by dropping it at the top and seeing if it hit the ground. If it didn’t catch in a kink or bend, it was straight enough. The knobs keep the faces from wearing.
But that doesnt explain the 20-sider with the tiny holes.
Part of me wonders if colored or marked discs weren’t inserted behind the smaller holes via the largest one and the thing thrown in some sort of outdoor gambling game. That doesn’t make much sense for the 20-sider, either.
I need to see the videos showing how it was used for knitting.
https://www.youtube.com/watch?v=76AvV601yJ0
But as that one article said they have found no knitting needles in Roman finds, no indication of gloves made. I did once see a guy saying to make a glove with a dodecahedron made of metal, I think he said bronze, would be way too much money spent on such an item for gloves.
I really don’t think it was for that purpose.