I needed a filament clip that was low profile enough to fit on the very full spools of ABS that I have. A lot of the other clips out there would stick out farther than I liked. So I designed my own.
Using up some dreg spools they printed fine, but I'm guessing I need to scale them to work if printed from PLA. Doesn't actually bite or hold the filament on any of the spools I had out to test them on.