Detail 01
18:1 gear ratio
Provides the stated precision-tuning control.
Product detailSKU #1500000429862
GroverProfessional Mandolin Vintage A Style 409 Series White Button Tuning Machines Gold
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Independent shopping perspective
The Korena take
Grover’s 409 Series set is a vintage A-style mandolin tuner option with white buttons and a gold finish. Its 18:1 ratio is intended for precise tuning and stable intonation, while the open worm-under gears, die-cast plates, and bell-top screws give the headstock a period-minded appearance. The 25/64-inch post hole and 30.3 mm post length provide the key measurements to check when matching this set to a mandolin.
Strong match
Who this is for
- Replacing mandolin tuners when the instrument’s post-hole size and post length match these measurements.
- Players seeking accurate tuning control alongside open-gear, vintage-styled hardware.
What matters in use
The specifications, translated
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 02
25/64-inch post hole; 30.3 mm overall post length
These are the installation dimensions to compare with the mandolin.
Final check
Know before you order
- 01Confirm that your mandolin accommodates a 25/64-inch post hole and 30.3 mm overall post length.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What finish and button color does this version have?
It pairs a gold finish with white buttons.
02What is the gear ratio?
The tuning machines use an 18:1 gear ratio.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- White
