A plastic bolt, fitted with two nuts. Nothing especially amazing at first sight. However when you thread the nuts on to the bolt, one of the nuts turns in one direction, and the second one turns the other way. How is this possible?
If you take the bolt with the two nuts already threaded on to it, and hold the two nuts while you turn the bolt, the nuts will move in opposite directions. Depending on the direction you turn the bolt, the two nuts will either move apart or they will move towards each other. How amazing is that?
Designed and made by Scott Elliot on his 3D printer, this is a very novel puzzle.
Scott calls this puzzle 'It's Nuts, Its nuts, or... Its' Nuts!'
The bolt is 63mm long.