The triple Bearing Diabolo features a wide one-way roller bearing axle for increased spin time. It boasts quality construction and components. It is molded from tough plastic and made to last. The Axle: The axle is made wider than standard diabolos allowing for super finger grinds and axle play. Unlike standard fixed axle diabolo, SJ-121 features triple bearing which gives it a fast spin as well as a super long spin time! Tricks once not possible with the standard diabolo are now possible with the SJ-121!