Made out of aerospace grade aluminum it has a helix-shaped groove milled alongside the whole surface.Designed to spin on any desk or flat surface. The solid spherical body and smooth finish make it very pleasant to interact with. It spins silently so you won't be bothering anyone around.Every globe has a rotating base equipped with high-quality stainless steel bearing. It guarantees a smooth and silent spin as well as long-lasting. The base is removable to easy access the bearing. Kinetic desk toy with full body optical illusion,a precision machined globe that creates a full body optical illusion when spun. Simply rotate it to reveal the mind-bending effect of a continuously flowing spherical helix.When revolving it creates an almost magical effect that looks like continuously flowing helix would merge into a surface of tabletop. Want to surprise someone? The kinetic desk toy makes a truly great and original present that creates a bit of magic every time you interact with it. Each unit is designed with attention to the smallest detail and built to last a lifetime. We enjoy seeing the reactions when someone spins it for the first time. It instantly creates that ''WOW'' effect. The most frequent ones: WHAT?!Again please... HOW?! or simply Mesmerizing Built 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.There is something oddly attractive about the shape of the sphere- it just asks to be held in a palm. It was the best choice for