Push-on guitar knobs?

[Rich44]

Do they generally fit most basses? I.e. are they generally a universal size.

[Jean-Luc Pickguard]

If you mean ones to fit split-shaft knurled Pots: The answer is yes. You can loosen or tighten the fit if required by gently squeezing the two sides of the shaft together with pliers or easing them apart slightly with a screwdriver - but be careful not to break one of the sides off.

[bumnote]

A good tip I was given to take them off if they are a bit tight is to use 2 teaspoons using the bowl bit one each side. Much easier than using a scewdriver and gives pressure both sides,

[Rich44]

Thanks guys, been wanting some chrome ones as a minor upgrade.