Good quality radio knob
Pricey but does the job. Bought two of these to replace the tuning and on/off volume knobs on an old Roberts Radio. They fit very well. The plastic knob has an internal metal collar through which the grub screw fixes the knob to the spindle/shaft. I was concerned that overtightening could strip any thread in the plastic knob but the metal collar sorts this out. Low profile and doesn't look out of place on the radio.