SPECS: Diameter 57mm, Width: 29 mm, Weight: 60 grams WORLD CHAMPION: This Yo-Yo was designed and used by World Champion, Dale Oliver. CLASSIC SHAPE: This Yo-Yo is designed to perform all kinds of looping tricks. BALL-BEARING: For longer spinning time and more tricks to learn, we used a Size E Ball Bearing. OUR PROMISE: 100% Satisfaction Guaranteed. If you have any questions or concerns about our products, we promise to make it right. Just contact us anytime. The Tornado by Spintastics is designed and used by World Yo-Yo Champion Dale Oliver. This Yo-yo is engineered for looping and responsive tricks like Loop the Loop, Shoot the Moon, Rock the Baby, U.F.O, Milk the Cow, and Dog Bite! The material we used is ABS plastic which is one of the strongest and safest plastic for yo-yos. This is a take-apart design – it means you could open the yo-yo if your strings got tangles and knots and for maintenance purposes. Unlike the other yo-yos in the market, you cannot take it apart. This is a ball-bearing yo-yo for extra spin-time!