Another dovetail puzzle box, but this time, gravity will not help you... Will you be able to open it?For this puzzle you have to use two 1/2" diameter (12.7mm) steel ball bearings (hint!). I will reuse these balls for next puzzles. You can find some clues on how to solve this puzzle here: http://wp.me/p3gI7M-3G To assemble the puzzle: 1/ push the 2 steel balls in the holes (1 per piece) 2/ hold each ball/piece between the thumb and forefinger 3/ completly slide the the pieces starting with the corners with the arrows 4/ try to open it!