UPDATE: I've completely re-worked these and uploaded a new design with the same styles. The new design has slots in the back for standard 1/2" push pins to slide in. This results in a much more secure mount. You lose a little bit of storage space, but the mounts for the push pins are angled so small nuts and bolts still slide out easily.
I 3D print a lot of prototypes for work and needed a convenient way to sort frequently used hardware without taking up more space on my desk. I designed these to mount to a cubicle wall with standard pushpins.
I didn't think they were particularly noteworthy but I posted them on reddit and someone asked for the .STL files, so here you go I guess.
Infill and Resolution shouldn't really matter. Supports are recommended.
At 0.2mm resolution, the short ones print in about an hour, the tall ones print in about two hours.