As found on Highway 1 Precision Bass and Jazz Bass. Also used on Mexico Standard Basses. Large cloverleaf keys. Press in headstock bushings. Each tuning machine mounts to back of headstock with four screws. Headstock bushings and mounting screws are included. Slotted string post has 'safety string' hole to anchor the end of the string. Brand New. Genuine Fender 0036400049.