Ender 3 knob that is designed to use a 1/4" heat insert. The size and info for the hardware is on one of the pictures.

Print with the build out on top so you don't need supports.

Its much smaller then the stock ones, so you don't accidentally turn them, they're also great so little fingers don't find them as easy!

V2 UPDATED!
Whats New?

Added "Up & Down" Direction
Made side grooves larger and deeper so its easier to turn
Added an offset so the knob sits lower then the printer plate.

Creality

Ender 3

No

No

200

20