These round magnetic coin shaped fidget sliders are also known as Haptic Coins or Devil Milk Caps. Set into each half of the metal coin are six small strong magnets, and the two halves of the coin rotate on a bearing. The magnets provide a satisfying amount of resistance and a fairly quiet click sound as you turn it. You get a very nice haptic feedback when you fidget with this. The size also makes discreet one handed fidgeting possible, which is important at times.
