Apple Lightning to 3.5 mm headphone adapter keychain

My friend asked me to make a holder to clip the new Apple 3.5 to lightning headphone adapter to his keychain. I also have an iPhone 7 and having this will save me the $9 that would have cost me every time I lost this thing.

I also included the Fusion 360 file, STEP file, and STL file so you can modify it for your printer/settings, and needs.