My favorite EDC screwdriver is the Victorinox Cybertool, which uses 4mm bits. I wanted a way to carry around extra bits for it and I couldn’t find anything on the market, so I decided to design my own solution. This is what I came up with. It’s an insert for a standard zippo shell that utilizes a spring/hammer closing system similar to the original lighter insert. It even sounds and feels like a regular zippo.
You can find the STL file here: https://www.thingiverse.com/thing:6570806
