I have modeled this usefull bike tool. But I have modified original design to be able to use both "holes" to screw/unscrew presta valve core (see attached photos).
I have tested and fits perfect, no loose.
Enjoy
Printer Brand: Prusa
Printer: i3 MK3
Rafts: No
Supports: No
Resolution: 0.12
Infill: 100%
I scanned original tool and modeled in Autocad 2018
The author marked this model as their own original creation. Imported from Thingiverse.