Double Keys Box Puzzle by damienb

Last crawled date: 4 years, 7 months ago

This is a trick opening box!
Following the proper steps, you will be able to reopen it.
I've added some clues on how the puzzle work in my blog: http://wp.me/p3gI7M-4V
Note: You need two 1/2" (12.7mm) diameter marbles or ball bearing to operate the mechanism inside.