Features: 1, Great For Fidgety Hands, ADD & ADHD Sufferers Helps Relieve Stress. 2, Perfect size suitable for Adults and kids. 3, Easy To Carry,Small,Simple,Discrete and Fun,also effective for Focus and Deep Thought. 4, SLA technology,laser industrial molding technology,resin materials,accompany you year by year. 5, Use 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.