The 2010 World Yo-Yo Contest Special Edition Double Jokers came to us from Daisuke Shimada himself at the contest and we would like to thank him and YoYoJoker for sponsoring the event. The Double Jokers have a more convex shape to them than the Uroboros and with its wide gap and great rim weight you're going to get great spin time. 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 Double Jokers are no joke.