Detail 01
18:1 gear ratio
Supports the product’s stated accurate tuning adjustment.
Product detailSKU #1500000429863
GroverProfessional Mandolin Vintage A Style 409 Series Black Button Tuning Machines Nickel
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Independent shopping perspective
The Korena take
The black-button, nickel-finish 409 Series set brings vintage A-style mandolin hardware into a practical tuning upgrade. An 18:1 ratio supports accurate adjustment for consistent intonation, and the open worm gears, die-cast plates, and bell-shaped screws carry the retro visual detail across the assembly. Grover describes these as dropping into most mandolins, making the set relevant when replacing existing machines while retaining a traditional open-gear look.
Strong match
Who this is for
- Updating most mandolins with black-button, nickel-finish vintage-style tuning hardware.
- Players who want accurate tuning adjustment with open worm gears and die-cast plates.
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
Open worm gears and die-cast plate
Combine the open-gear vintage appearance with the listed plate construction.
Final check
Know before you order
- 01The set is described as a drop-in option for most mandolins; confirm your instrument’s existing tuner layout before ordering.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What finish does this version use?
It has a nickel finish with black buttons.
02Does it have open gears?
Yes. It uses an open worm-gear configuration.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Black
