I wanted to replace the knobs on my Ibanez EHB1005SMS as Ibanez cheaped out and used trashy looking plastic knobs on a relatively expensive instrument.
They fit very well in the slight indent in the body, screw on well to the potentiometer shafts and look and feel quite nice. Heavy and solid.
For the single, non-concentric pots I've used the "Harley Benton Parts T-Style Knob Black" which matches the look of these knobs perfectly. I am extremely satisfied.
Only downside is that the marking on the lower knob is hard to see, maybe if it were painted in gold as well that would make it better.