Warning: Not suitable for children under 3 years. For use under adult supervision How to use it？ 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. These are perfect pocket pieces for people wanting something small,simple,discrete and fun-also effective for focus,stress relief and deep thought. Great Toy For Fidgeters, Anxiety, Focusing, ADHD, Autism, Quitting Bad Habits, Staying Awake Ideal for people trying to quite nail biting, smoking, leg shaking and all type of attention disorder issues. Ergonomic curved shape design for hand comfort and long term usage. Simply flick and spin for hours with one or two hands! High Speed Hybrid Ceramic ball in the center to ensure the smoothest rotation and consistency. 3 Steel 608 counterweight bearing weights to increase centripetal force and spin time. No Repair, Oil, Maintenance needed! Use it right out of box. All 4 bearings are removable for future upgrades, after market modification and customization! Restless mind and fidgety hands? This spinner is the solution! No more 3D printing and edge sanding! Durable ABS frame construction with rounded edges, complimentary cap cover! The high performance ZrO2 hybrid ceramic bearing in the center allows for up to 3 minute spins, and glides effortlessly in your hands. The 3 additional bearings around the sides have been choses for their slightly higher weight, which gives the spinner additional inertia for long spins, and each side bearing also provides great off-center fidgeting fun.