Customizable Magnet Clamp/Holder for Cables, Etc.

A very customizable design for magnetic holders/clamps to hold anything roughly cylindrical in place, or out of the way.
This came about because a couple of fiber optic cables and wires wouldn't stay out of my way (they really want to straighten instead of staying curled) while I was soldering a device nearby.  Over the years I've used the same basic design for larger objects as well.
There are double sided (2 magnet) and single sided (single magnet) versions. The smaller ones use 3x1mm disc magnets, and the larger ones use 6x2mm magnets. Of course, you can customize them to use other size magnets.
PLA works, but PETG, ABS, or ASA would be less likely to break when you accidentally drop or hit them.