
Tungsten alloy DIY hand spinner is composed of a bidirectional or multi-directional symmetrical body as the main body, embedded with a design combination of bearing in the middle of the main body, and the whole constitutes a planar rotating device, and can also be embedded with the same weight in the bi-directional or multi-directional symmetric body. According to the principle of centrifugal force, when the object is in non-linear motion, because the object must have its own mass, the inertia…