The Rack Puzzle is an excellent puzzle that will challenge without being intimidating. It is very well made of heavy “stainless steel” wire ,strong,durable nylon cord and bright wooden balls. It should stand up to lots of use,and is virtually impossible to break without applying unusual force. As a matter of fact,hardly any force at all is required to remove the balls and cord. It is just as challenging to replace it ,once you have gotten it off. As with many “disentanglement puzzles” like this,a further challenge can be had by trying to solve it blindfolded. Also listed here on Amazon is the identical puzzle made by Family Games; who rate it a Difficulty 3 out of 5.Puzzle Master give it a Difficulty rating of 8 on a scale of 6 to 10.In both cases meaning Medium Difficulty. So, it’s a little more difficult than it looks.
You can purchase this puzzle and get the solution at Puzzle Master.