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      Grover Professional Mandolin A Style 409 Series Pearloid Button Tuning Machines Nickel
  
Grover Professional Mandolin A Style 409 Series Pearloid Button Tuning Machines Nickel
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    DetailThe Grover (409 Series) professional mandolin machine heads are designed for serious musicians looking to keep their instrument in tune. Their specially engineered, adjustable worm gear and die-cast plate maintain the center lines of the gear and worm to ensure correct alignment for precision tuning. The 18:1 gear ratio provides ultrafine-tuning tuning control, allowing you to dial in the perfect pitch. The bell-top button screws give these machine heads a vintage aesthetic while the open-gears in a modern "worm over" configuration make tuning quick and easy.
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