internal combustion

It is rated as a level 8 out of 10 (demanding) by Puzzle Master which I think may be a little high. It comes nicely packaged in a large blue box with the puzzle attached to a card by plastic ties - mine was jammed on quite tight and took a bit of doing to remove. Luckily, being made of solid aluminium it is very tough! The size is a pretty decent 6cm square and 3.4cm high and is quite a considerable weight (don't drop this on your toes!) The finish is pretty good - nice and smooth with the edges nicely rounded. The cut-outs for the burr pieces are a little sharp but overall this is a very nice looking puzzle.

The box is a simple box with space for the burr pieces and no internal obstructions like some of the other boxes burrs I have seen. The aim obviously is to disassemble and then reassemble it - previous reviews of this by Neil and by Oli have both stated that reassembly is quite a lot tougher than the initial take-apart. The solution is apparently in included in the box but I think I threw it out without looking for it! If you did the same then you can download one from here.