The Revo 2 spinner is the perfect pocket piece for people wanting something small, simple, discrete and fun. The Revo 2 spinner is also effective for focus, stress relief and deep thought. How to use the Spinner: Hold spinner in one hand and use the other hand to spin it rapidly using small continuous strikes. Note: 1.Please allows cm - 0.5cm error as manual measurement. 1.Ple colour just for reference only,as different monitor,colour will slightly different from pictures shown.