There's nothing complicated about a simple nut and bolt pairing, but this isn't your average nut and bolt. The "Nut Case" puzzle by Hanayama takes the form of an apparently unsolvable problem: two ...

How to Unscrew Rusty Bolts on any Toyota. Published: 25 Sep 2013, 16:09 UTC • By: Gabriel Brindusescu. 1 photo. Photo: screenshot from Youtube.