AMILIFE spinner feature: Color: Gold diameter:2.75 inch (7 cm) thickness:0.39 inch (1cm) package included: 1*fidget spinner 1*hanging buckle the spinner can 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. These are perfect pocket pieces for people wanting something small, simple, discrete and fun-also effective for focus, stress relief and deep thought. Note: 1.Please allows 0.1-0.2 inches error as manual measurement. Product description 1.Our store is AMILIFE, if you purchase other stores' product, we couldn't promise the quality of other store. 2. High speed stainless steel bearing .These are removable. 3.Great toy for fidgets. Flick and spin for hours with just one or both hands 4.Great for anxiety, focusing, ADHD, autism, quitting bad habits, staying awake.