GROVER Professional Mandolin A Style 409 Series White Button Tuning Machines Nickel

The Grover (409 Series) professional mandolin machine heads are designed for serious musicians looking to keep their instrument in tune. With an 18:1 gear ratio, these tuners provide precision tuning for any style of mandolin. The open gears in a modern 'post hole' configuration and die-cast plate ensure correct alignment for stable intonation. A bell-top button screw gives these tuners a vintage look while the generous 25/64" post hole and overall post length of 30.3 mm provide flexibility in setup.