They are for the split shaft push on splined type pot shafts, not the smooth ones, like you find on cheaper basses.
Exact Vintage Jazz Bass Knob Set (2 large and 1 small knob set)
Real Bakelite Jazz Bass Knob Set (3) Set Screw For Fender
Bartolini 59CBJD L1/S1 5-string Classic Dual Coil Jazz Bass Pickup Set
Retrovibe HyGain Jazz Bass pickup set Adjustable pole pieces ceramic magnets
JAZZ BASS PICKUP SET Alnico V Neck & Bridge + screws & springs in 3 colours
1969 FENDER PRECISION / JAZZ BASS TUNER SET
