The 2010 World Yo-Yo Contest Special Edition Uroboros came to us from Daisuke Shimada himself at the contest and we would like to thank him and YoYoJoker for sponsoring the event. The Uroboros have a nice smooth shape that is very comfortable in the hand. Made in Japan these pieces support a higher price tag for the kind of craftsmanship and quality you get from the meticulous machining from a Japanese product. It uses a large size C bearing and flowable silicone response for a higher level of professional play. These Uroboros are no joke.