Super effective clip for 1.75 mm filament spools.

• Stops filament tangling.
• Doesn't interfere with spool stacking.
• Filament clicks firmly into place.
• Accommodates hard and soft filaments like NinjaFlex.
• Clip can be left on spool while printing (for printers that draw filament upwards).

To use: Thread filament through oversized center hole. Wrap filament around and click it into top slot.

I've included files for a single clip and a cluster of sixteen. Can be scaled up for 3 mm filament.