It is a precision machined desk toy that creates a mesmerizing optical illusion when spun. Simply rotate it to reveal the mind-bending effect of a continuously flowing helix. •A piece of kinetic art that invites you to transform it from precisely engineered still shape into hypnotic optical illusion •When revolving, it creates an almost magical effect that looks like continuously flowing helix would merge into a surface of tabletop •It is designed to spin on any desk or flat surface. The solid body and smooth finish make it very pleasant to interact with. It spins silently so you won't be bothering anyone around •Perfect for creators, makers, thinkers and anyone who wants to release their inner creativity and imagination. Keep focus, relieve stress or simply relax during working hours or brainstorming sessions •It is detachable, and the bearing can be replaced Specifications: •Material: aluminum alloy •Net weight: 71g •Diameter: 40mm Package included: •1 x Spherical Gyro