Material: Alloy Packaging: 1 piece Size: 55*55*36MM Function: Interactive toy, decompression toy Description: A yo-yo is a toy that in its simplest form consists of an axle connected to two discs and a length of string wound around the axle, similar to a narrow spool. It's played by holding the free end of the string, called the handle (usually by inserting a finger into a half-slip knot), allowing gravity or the force of a throw to cause the yo-yo to spin and unwind the string (similar to how a drawstring works), and then letting the yo-yo roll back to the hand, utilizing its spin (and the associated rotational energy). Made of high-quality metal alloy material, it's smoothly polished, durable, and long-lasting, making the yo-yo's spin more stable and enduring. It features a fixed dynamic bearing, which can keep the sphere rotating for a long time and satisfy children's play needs. As a classic childhood tradition, it can practice children's hand-eye coordination, improve children's athletic ability and divergent thinking, and is a very good educational toy. With high-tech design, such as a unique rotating function, children will have more fun in the playing process. Note: Due to manual measurement, please allow a 1-3mm error. Please make sure you do not mind before you bid. Due to the differences between different monitors, the pictures may not reflect the actual color of the item. Please refer to the actual picture you received. Thank you very much.