Yoyo, BlitzFire by Yoyomamma, not yoyofactory, duncan, yomega, yoyojam, hspin, dif-e-yo, spyy 10 ball Grooved bearing, stacks, O-ring response system, 2 high quality strings included along with spare o-rings. Not a yoyofacfory, duncan, hspin, yomega, yoyojam, spyy, dif-e-yo