I have come across this puzzle many times over the years. Sharper Image Circle Shape Brain Teaser is often included in a box or set of basic brainteaser puzzles. Sometimes it is made of fairly light wire, but in this case it is heavy stainless steel about 1/4 inch in diameter. Hardly what you would call wire, steel rod would be more appropriate. It would take a great deal of force to bend, break or destroy the puzzle. It takes a bit of thinking to solve the puzzle and definitely not with any force. It is far from being intimidating to young, old, experienced or novice puzzle solvers. In other words, it would seem simple to solve but shortly after attempting, it seems impossible. It’s an excellent brainteaser and that is why it has been so popular over the years. It has been sold by many companies and was called different in names. Along with the above, it is called Metal Chain Link, Magic Link etc. As a matter of fact, finding the name for this puzzle is as difficult as solving it, if not more so! You can purchase this puzzle at Amazon.