A puzzle called the Devil's Sphere.Such puzzles were carved from ivory in Japan. This sphere is made in the Celtic style.
4 concentric spheres with holes.The largest sphere has a diameter of 100 mm.The remaining spheres are reduced in proportion to 0.9% of the previous sphere.
The puzzle is movable but not collapsible. Can be used as an unusual case (for example, for a flash drive).
The file is saved in the following formats:BlendStlX3DObjMtl
Suitable for 3D printing.