Filament Clip from Binder Clip with One Handle Removed

After trying most if not all of the 3D printable filament clips, I stumbled across a solution that not only doesn't require any printing, it is dead easy, and just works. Simply use a 3/4 inch (19mm) binder clip with one of the handles removed. The diameter of the handle holes are exactly the right size for 1.75mm filament. See photos.

I recommend placing the binder clip on the rim of the filament spool before removing the inner leg.

These are the clips I use: https://www.amazon.com/Coofficer-Binder-4-Inch-Supplies-96-Pack/dp/B07BPMPV77