I wanted to have a nice bead for my new knife to keep it safe in my pocket.
So I found this very nice zipper pull https://www.thingiverse.com/thing:2964738 designed by armourcraft https://www.thingiverse.com/armourcraft

And beacause I wanted it to be in the (for me) correct orientation when the knife is in the pocket, I rotated it and added a little plug to hide the knob.

The new skully bead is a little bigger than the original one to fit a 4mm paracord.