A Rhotuka spinner was a wheel of energy generated by the willpower of its user and able to be hurled great distances using a Rhotuka launcher. The power of a Rhotuka spinner was determined by the being who launched it. The ability could be unique to an individual and based on one's own traits. Generating a Rhotuka spinner cost its user energy, so they could be created only so frequently.
Being pure energy, Rhotuka spinners made very little noise when they flew.
A Matoran's Rhotuka would not necessarily be elemental, but it would be relatively weak (weaker than a Toa's or Roodaka's).