Sperzel Trim Lock 6 in line Tuners
Sperzel make some of the best locking tuners available. They are made in the USA. 12:1 ratio is super smooth, and the feel of the materials is great.
One of the major features is the staggered height posts. This means no string trees!!!
These do require a modern 10 mm hole diameter.
They are available in 6 different finishes (and more if you ask us)