Professional Yoyo 10 ball bearings, inner groove, cage, outer groove design - making the Yoyo a high-performance, non responsive professional bearing suitable for 1A/3A/5A skills.There are many great techniques to learn with explanations, suitable for advanced players in competitions or daily practice, which can cultivate imagination, creativity, and quick reaction ability. Train fine motor skills and hand eye coordination abilities. Excellent Design Two color anodizing makes the surface look more textured, and the metal yoyo ball is made of aluminum 6061, with a stable and balanced high-speed routine. The ultra smooth sandblasted surface never fades or scratches.If you have any questions, please feel free to contact us at any timeIt is a good choice for giving gifts to friends and family