Figure skating training tool. You have to be perfectly balanced/centered to make it around. It was hard to find vids that weren’t done by a 10 yo.

This the type I have been using except mine is half or maybe a third the size. The round disc is half the size of one disc, but otherwise looks and works the same https://youtu.be/LgI5AMQ347g

This one is more like what I am trying to practice but without the resistance bands https://youtu.be/-PcElr7qT3Q

This is the new kind I got. More like actual skating because you can rock back and forth like on a blade and travel https://youtu.be/2u77hf2f75I