These are sealed locking tuners (machine heads) 6 in line. Fits for modern standard 13/32 inch (10mm) peg holes. They are a 19:1 ratio for smooth turning. Locking tuners are in our experience great for providing maximum tuning stability.

Included in your package:

6 Locking Machine Heads, 6 Washers, 6 Nuts and 6 Screws.