The puzzle is composed of 3 identical resin pieces and 3 small metal (probably brass) rods which are not identical. Actually I put the puzzle under the "metal puzzles" label, but I could have even created a new label called "resin puzzle" because resin represents most of the materials used to craft the puzzle!
As you may have guess, the goal is to separate the 3 pieces and it will not take you ages to succeed. Pushing back and forth the rods will soon allow you to solve the puzzle :-)
I feel the challenge (not overly difficult, though) is more to reassemble it. It's always difficult to take the decision where to begin with: should you assemble 2 resin pieces and then try to put one metal rod? Or perhaps best is to put one metal rod through a small part of a resin piece? Or even try to assemble all the 3 resin pieces and then all the 3 rods?
In any way, there are not so many possibilities and you should not have (too many) difficulties to reassemble it. But well, that still a nice challenge! And, as the resin is not transparent, then you need to guess where the holes in the rods are or to position carefully the rods before.
Despite being a puzzle, it is also (in my opinion) an art piece, especially when you know the background of the designer of the puzzle, then well it cannot be seen as only a puzzle!
Charles O.Perry crafted other bi-material puzzles, but this one is definitely the most original!