The plastic housing for the usb stick I carry on my keychain broke so I made this quick replacement. It doesn't look anything like the original but its fits the internals well and seems solid. I'm not sure about the keychain ring but time will tell. Print pretty much however you want, I notice the grips on the underside don't work that well at anything thicker than .2 layer height so I would print at at least .2 but its not essential as it will still work fine at pretty much any layer height.Other than that just print it and stick in the internals from the USB Stick. SKPs so you can modify for your own USB sticks if you like.