Based on
Stewart Coffin's Cluster Buster, and inspired by an ex-girlfriend of mine, this "Ball Buster" puzzles comes on a "Nut Buster" display stand, which is also a challenging puzzle. Both of these puzzles require a lot of dexterity to solve.
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This very difficult puzzle has a hollow space inside big enough to hold a coin or ring, and comes with an elegant display stand which is also a challenging puzzle!