Package includes knurled chrome knob, cap, coupling sleeve, and set screw designed to be used with an S-1™ Switch. Fits 1/4" solid shaft controls. The S-1 switch can be retrofitted to nearly all Telecaster® and Precision Bass® models (US and Mexico) produced from 1951-Present. Brand New. Genuine Fender 0059272049. UPC 885978451920.