Detail 01
18:1 gear ratio
Supports precise tuning adjustments.
Product detailSKU #1500000429805
GroverProfessional Mandolin F Style 409 Series Black Button Tuning Machines Nickel
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Independent shopping perspective
The Korena take
The nickel-and-black version of Grover’s Professional Mandolin F Style 409 Series offers a focused tuning-hardware update for mandolin players. Its 18:1 gearing is intended for accurate, small adjustments, while the staggered worm-over open gears are designed to stay correctly aligned in operation. The die-cast plate and bell-top button screws give the assembly a vintage-style visual direction. It is presented as a replacement option for many stock tuners, provided the mandolin uses 25/64-inch post holes.
Strong match
Who this is for
- Replacing stock mandolin tuners on instruments with matching 25/64-inch tuner post holes.
Consider the trade-offs
When to look elsewhere
- Mandolins with tuner holes other than 25/64 inch.
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
Staggered worm-over open gears
The gear layout is designed for correct alignment and smooth operation.
Detail 03
Die-cast plate
The plate keeps the gears properly aligned.
Final check
Know before you order
- 01Check for 25/64-inch tuner post holes before replacement.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What color are these tuning machines?
They have a nickel finish with black buttons.
02Can they replace stock tuners?
They are designed as a drop-in replacement for many stock tuners with 25/64-inch post holes.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Black
