1Premium: Our aluminum alloy ball is one of the best premium unresponsive with great spin, great stability and great performance on the string.2Shock Resistance: Metal have aluminum alloy shells and bearings, which enhance the shock resistance and drop resistance of aluminum .3Material: Our product is made of aluminum alloy, it has a stable and balanced high speed program. The ultra glossy sandblasted surface never fades and won't get scratched easily.4Training: You need constant training if you want to play all kinds of tricks. Advanced training can exercise people's physical coordination ability, cultivate children's perseverance and patience.5Bind Return: ball comes with an unresponsive concaved bearing. You will need to learn a trick called a bind to bring back.1 x Yoyo3 x Strings1 x Glove1 x Manual