The Arcanum puzzle is an interesting design from Infinite Loop Games.
There are sixteen pieces which you must put into the slots of the base in the correct positions so that the top of the box can be closed completely.
A fun puzzle to play around with but not exceptionally challenging.
The solution is included as well in case you need it.
These are handmade in the US from maple and measure 96.5 x 96.5 x 51mm. The loose pieces come in a handy pouch to keep them in.