This is the fine tuner knob for the 2760 Steeler. This might also be the fine tuner for the 2720 Spyder which had two options. You could either have this large shaft #8477 fine tuner which used in the last manufacturing run, or the smaller #8377 fine tuner with a smaller threaded shaft used before 1988 mostly. So if you have a 2720 Spyder, please check to be sure if the threaded shaft you need is a smaller 1/8" shaft or
this larger 3/16" shaft. (These do not fit Floyd Rose tremolos). The Floyd Rose fine tuners are #9255.