1Premium: Our aluminum alloy yoyo ball is one of the best premium unresponsive yoyos with great spin, great stability and great performance on the string. 2Shock Resistance: Metal yoyos have aluminum alloy shells and bearings, which enhance the shock resistance and drop resistance of aluminum yoyos. 4Training: You need constant training if you want to play all kinds of tricks. Advanced yoyo training can exercise people's physical coordination ability, cultivate children's perseverance and patience. 5Bind Return: Yoyo ball comes with an unresponsive concaved bearing. You will need to learn a trick called a bind to bring the yoyo back. It is recommended to learn more yoyo tips on the Internet. 3Material: Our yoyo 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.