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Grover Mandolin Machine Heads (409 Series)
Mike Lawson | June 1, 2021Cleveland, OH-based Grover Musical Products announced Grover professional model mandolin machine heads (409 Series). 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. The worm to gear ratio is 18:1. Read More...
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