Detail 01
18:1 gear ratio
Delivers smooth, accurate tuning adjustments.

Independent shopping perspective
The black chrome Grover 505 Series Mid-Size Roto-Grip set uses a 3+3 layout, compact housings, and an 18:1 gear ratio for careful tuning adjustments. Its locking posts hold the strings firmly, helping prevent slippage and maintain tuning stability during live performance or studio recording. It is intended for the listed inline, 12-string, and smaller-headstock applications. For a guitar equipped with non-locking Grover MINI 205 tuners, these machines are designed as a direct replacement requiring no modifications.

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
Delivers smooth, accurate tuning adjustments.
Detail 02
Secures strings in place to help prevent slippage and improve tuning stability.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Yes. The locking system is described for maintaining tuning stability in live and studio use.
It firmly secures strings, helping prevent slippage and improve tuning stability.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.