Specification:Super cool appearance: devil eye center with two hollow bat wings on both sides.Great for fidgety hands, ADD & ADHD sufferers. Helps relieve stress.Perfect size suitable for adults and kids.Easy To carry, small, simple, discrete and fun, also effective for focus and deep thought.Used this way:Hold spinner in one hand and use the other hand to spin it rapidly using small continuous strikes to keep it spinning indefinitely, with practice, spinners can be spun using one hand only using the fingers of one hand to stop and start spinning.Type: Hand SpinnerMaterial: Zinc AlloyRotation Time: at Least 3 MinutesFeatures: Easy To Carry, Finger Toy, Fashion DesignLength: 72.29mm/0.28" (Approx.) 

Specification:Brass material hand spinner great for anxiety, focusing, ADHD, autism, quitting bad habits, staying awake.Perfect fidget toy to keep your hands busy or to just play with.It feels nice in the hands and it is silent so you won't be bothering anybody.Fidget spinner run time approximately 3 - 8 minutes, zinc alloy with high speed  ball bearinganti-dust design protect the bearing, interior and exterior anti-dust design protect the bearing.As its know to all the dust on the bearing will effect its service life and rotating timeUsed this way:Hold spinner in one hand and use the other hand to spin it rapidly using small continuous strikes to keep it spinning indefinitely with practice, spinners can be spun using one hand only using the fingers of one hand to stop and start spinning.Type: Hand SpinnerMaterial: Zinc AlloyFunction: RotatingRotation Time: 3-8 MinutesSize: 65mm x 65mm x 8mm/2.56" x 2.56" x 0.31" (Approx.)Features: Easy To Carry, Small, Simple, Discrete and FunNotes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.This product can not be washed with water! After playing a long time, soak it with alcohol, for cleaning the bearing.