The name comes from a movement in the puzzle that needs to be discovered in order to find a compartment.

Constructed from walnut, maple, cherry, and an exotic (or burl) wood used for front and back of the puzzle.

The mechanism can be solved without the use of external tools. No banging, forcing, or spinning allowed. Once fully open, the mechanics can be viewed and in the palm of your hand.

4.5x3.25x3

Prefect for someone just starting to get into puzzles