Summary

Taken from the original (https://www.thingiverse.com/thing:2594163)

This is a one-way snap on.
This knob can be used for holes without gaps.

step 1. Hook paper clip on zipper hole.
step 2. Insert clip into the body. (may need pliers)
step 3. When you hear a click, it is completed!

The V for vendetta logo is coming from the "V For Vendetta Necklace" (https://www.myminifactory.com/object/3d-print-v-for-vendetta-necklace-3389)