This folding credit card pen is wonderfully over-designed.
If you treat your wallet like a Swiss army knife, you may want to save a card slot for the Hancept Zero MK2. Made from ...
Hackaday10mon
This Is How A Pen Changed The World
Look around you. Chances are, there’s a BiC Cristal ballpoint pen among your odds and ends. Since 1950, it has far outsold the Rubik’s Cube and even the iPhone, and yet, it’s one of the most ...