Snake Ball is mass-produced as Cast Twist and for sale e.g. at PuzzleMaster.
Snake Ball is a mechanical maze. The object is to separate the two rings. The complexity from this puzzle is that one ring has a little pin that slides in the grooves of the other ring and vice verse. So you will have to solve two mazes simultaneous. The puzzle also has another surprise. When you are at the point that you think you have finally solved the puzzle, you will discover that you are only halfway.
Snake Ball was originally 3D-printed by George Miller, and sold at his Puzzle Palace website. However, with his shop closed down and demand for this puzzle continuing, the puzzle is now for sale here.
Note that the 3D-printed version comes in a uniform color, not the bicolor version on the photo. Please contact Oskar directly if you are interested in obtaining an assembled and bi-colored sample of this puzzle.