Grover Professional Mandolin Machine Heads 309FN, Standard 4 + 4, For “F” style Mandolins, Nickel
These new, professional model mandolin machine heads are the latest in technology. A specially designed, adjustable worm gear along with the die cast base maintains the center lines of the gear and worm to insure correct alignment for the finest tuning possible. The worm to gear ratio is 18:1. Screws and bushing provided.
F-type Deluxe Mandolin Tuners
18:1 ratio, Nickel with Pearl buttons, Worm over gear