This is a knurled Bic lighter case with a keyring hole and clip.

Hopefully it will help you keep track of your lighter!

The print is designed to fit tightly so the lighter does not slide out accidentally. If your printer is not calibrated well you might need to scale the model slightly.

I printed with supports under the clip, this may not be necessary depending on your printer.

I used aubenc's Knurled Surface Library v2 to create the knurling: https://www.thingiverse.com/thing:32122