NOT ALL COGS are created equal. Our Kaiko Fidget mini cogs have 'next level' bearings & distinctly branded Kaiko so there is no confusion. If quality & performance are your preference, these will not disappoint. These are small and super discreet. Slight hum and vibration on high spin make these multisensory and pure awesomeness! They are incredible as a discreet fidget, for constant hand movement and very stimmy input. Most who try these for the first time are surprised at how how long they spin for. They have a super fast spin, soft vibration & slight hum which is amazing. Rolling the cog over hands and fingers gives great sensory input. Fits in a pocket, is super quiet and is very discreet, making it ideal for the workplace, travel or the classroom.