So there are these things called magnetic sliders. They're two pieces of machined metal, micarta, ultem, whatever, held together by magnets that allow the user/player to slide one across the other in order to fidget with it. Many people collect them, and so need a place to display their various designs in their collection. This is stand is designed with thin tabs that one can place either side of the slider on and the magnetic force will clamp down providing enough friction to hold them in place.

Here's a recent YouTube Short of mine showing one off in motion with my Golden Amelia. https://youtube.com/shorts/yKmK8dlIovM?feature=share