- Core 608 Hybrid Ceramic Bearing with Si3N4 Balls For Incredibly Long Frictionless Spins.
- Easy To Carry,Small,Simple,Discrete and Fun,also effective for Focus and Deep Thought.
- Great for Fidgety Hands,Help ADD & ADHD sufferers Relieve Stress and Anxiety.
- No Repair, Oil, Maintenance needed! Use it right out of box.