Designed for .250 in smooth round potentiometer shafts. Added some retro-style knobs, inspired from control knobs on vintage effects and amps. Set screw hole designed to be tapped with 8-32 tap. M4 tap would probably work in metric world.
Technical
-3d Printer
-Filament
- 8-32 Tap
- 8-32 x 3/16 cup-point set screw
*You can use up to 8-32x1/2 set screw for "Chickenhead" style knobs.