GROVER PROFESSIONAL MANDOLIN “F” STYLE NICKEL SET 8 4 + 4 ON PLATE W/ BLACK BUTTON

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.