Detail 01
25/64-inch post holes and 30.3 mm overall post length
These measurements are provided for accommodating a variety of mandolin neck widths.

Independent shopping perspective
Grover’s nickel 409 Series puts white buttons on a vintage-style tuning-machine set made for retro F-style mandolins. Its 18:1 ratio and open gears in a worm-under arrangement provide accurate tuning control. Bell-top button screws and a die-cast plate complete the traditional appearance, while the plate is identified as providing stability. The 25/64-inch post holes and 30.3 mm overall post length are specified to accommodate a variety of mandolin neck widths.


Strong match
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01
These measurements are provided for accommodating a variety of mandolin neck widths.
Final check

Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.