Fidget spinning ring keychain with gears

Fidget spinning ring keychain with planetary gears: combines the functionality of a keychain with an engineering, stress-relieving mechanism. Shape and size: compact, pocket-sized. Spinning ring (fidget): a central part that rotates freely, useful as a stress reliever or finger toy. Planetary gears: a system consisting of a central gear (sun), several outer gears (planets), and a toothed outer ring (ring gear). Rotating one part moves all the others in a mechanically fascinating motion. Uses: besides holding keys, it is also an object to fiddle with for relaxation or for those who love mechanics.