Sold individually, this solid brass, dome top fine tuner knob with 6-32 (course) threading will fit all Kahler cam based tremolos (22xx, 23xx, 4200, 4300, 7200, 7300) and the Gibson Super-Tune tremolo. Can also be used on Kahler 2330 FLYER, 3330/7330 fixed bridges if you prefer the look.
This fine tuner looks just like the 8385 fine tuner but that has a 6-40 (fine) threading and is for 2500/2520 "Traditional" fulcrum tremolos, please check to make sure you are ordering the correct fine tuner.