The puzzle is to take the coin out of the triangular frame and put it back in place again.
The puzzle is not hugely difficult but Brian has confidence in saying that you probably won't have any other puzzle that looks and acts like this one in your collection and therefore it could easily trick you up for a while.
It was designed by Hirokaz Iwasawa (known to his puzzle friends as Iwahiro) and an entrant in the 2012 IPP Design Competition.
Size: The outside of the triangle measures 80mm x 80mm x 80mm Height 15mm
Like all Wil's puzzles this one is very well made. The puzzle is made from aluminum. Wil is a true puzzle solver and has the philosophical view that puzzles should not come with solution sheets. So, if you purchase one of these puzzles there will be no solution supplied.