Most impossible dovetail joints have a dovetail on each of four sides, with each dovetail pointing in the same direction, such as for N3164. This one is different because the dovetails point in opposite directions. It was designed and manufactured by Richard Parkins using his own 3D printer. It is made of plastic and has ‘John Davenport’ on the black face. The solution is quite different to the one that allows N3164 to be taken apart. Because the idea of this puzzle is to take it apart, people interested in mechanical puzzles also classify this as a Take Apart Puzzle. The puzzle was a gift from Richard in 2016.