Links
Designing a simple DIY wallet (+ multitool card)
n-o-d-e.net
What really takes this multitool to the next level though is it’s modularity. Since all these little accessories are half sized USB, they can be doubled up for even more compatibility. The 2 little 3D printed braces simply push and hold the components together, so for example the Micro SD USB adapter also works for micro USB and USB-C, same with the power PCB, allowing you to plug all this stuff into a bunch of different types of devices without needing loads of separate cables.