Fender Vintage Bass String Guide, for Precision Bass, Jazz Bass, Mustang Bass, Bass V, and most other cool old basses. Designed to fit most vintage and modern basses. Vintage 'disc' style, gold plated steel. Minimizes tuning problems and sympathetic overtones caused by low string tension over the nut. Fender now includes a gold phillips head mounting screw. Brand New. Genuine Fender.