The story he told about this design is:
The way I design most boxes is a bit different than most people would expect. I start by deciding the looks of a box. Of Course, I keep the inner mechanism in mind while deciding how a box will look like, but I have no idea how many steps it will be. Once I’ve decided how a box will look like I design a mechanism which will work with these looks. Because of this I never know how hard a box will be when I start designing. When I finished the mechanism it turned out the box had exactly 42 steps. Because of this, I named the box “The answer box” as a reference to the book the hitchhiker's guide to the galaxy in which 42 is the answer to the question “what’s the meaning of life”.
Mr Benno thinks the puzzle would be suitable for 10 years and over, but mostly aimed at adults, and he says it will need a lot of logic and analysis skill to solve.
Unlike standard Japanese puzzle boxes where you're moving external panels that are visible, this box has finger holes that allow you to slide panels under the outer layer. You have a sense of them sliding but you cannot actually see what they are doing or how one side of the box is interacting with the other sides, or the top and bottom. But they definitely are interacting. And with the right sequence of moves, in the right order, all 42 of them, the lid will come off the box.
Once opened there's quite a lot of space inside this box (100mm cube), and it's ok to put something inside without interfering with the mechanism.
The puzzle box is made from laser cut craft wood and is unpainted.
Size: 130mm x 130mm x 130mm
Space inside: 100mm x 100mm x 100mm
It is packaged in a natural cardboard box with a printed step by step solution inside. This is an eXtremely diabolical puzzle.