The Tigershark is designed and used by World Yo-Yo Champion Dale Oliver. This Yo-Yo is engineered for starters and players who want to learn modern yo-yo tricks. The Ball-bearing axle technology enables you to do all kinds of tricks like Walk the Dog, Rock The Baby, Brain Twister, and Trapeze. With enough practice, this yo-yo is also capable of modern tricks such as Double or Nothing, Boingy-boingy, Eli-hops, and Atomic Fire. 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.