Yoyo King Spin Control Responsive yoyo has a narrow C bearing that measures .250 x .250 x .187. This gives the Spin Control R the best possible spin time and makes it responsive. The Spin Control Yoyo has the perfect shape and transition, combined with the aircraft grade 6061 aluminum construction of the halves, and will give you the control you're looking for as you attempt all of your favorite intermediate and advanced yoyo tricks like Split the Atom, Trapeze, Double or Nothing and Around the World. This yoyo rocks when it comes to sleep time and string tricks. Add this high performance metal yoyo to your collection today. Yoyo includes a string.