This is an upgraded control knob for an MK3s printer. The knob is a combination of a small diameter knurled knob for good control with a larger flat surface. This flat surface can be used for large knob changes, but most importantly can be positioned to block access to the reset button. This prevents accidental resets and is great, especially around kids. The reset button retains full functionality, but requires a small rotation of the knob to access it.
The knurling surface and mounting interface is best printed with a .4mm nozzle.
The author hasn't provided the model origin yet.