Features:A good choice for killing time, helps relieve stress.Great for fidgety hands, ADHD sufferers.It's fun and interesting, also effective for focus and deep thought.Mini enough to put in your pocket, have fun anytime.Perfect size, suitable for adults and kids over 16 years old.How to use:Hold spinner in one hand and use the other hand to spin it rapidly and keep it spinning indefinitely by using small continuous strikes. Spinners can start and stop spinning only with the help of one finger.Specifications:Material: plasticColor:  black Item size: 7.3 * 7.3 * 0.6cm / 2.87 * 2.87 * 0.23in (L * W * H)​Item weight: 52g / 1.83ozPackage size: 10 * 10 * 1.5cm / 3.93 * 3.93 * 0.59in (L * W * H)Package weight: 57g / 2.01ozPackage list:1 * Hand spinner