The PRN-3422 is a right-handed set of open-back RATIO® Calibrated Machine Heads for acoustic guitars that use 3+3 side tuners.
It has a Butterbean button.
3+3 tuners set Ratio Tuned Machine Heads: The New Standard In Tuning Technology
Gear ratio: unique for each string position - one turn-one tone Peg holes diameter required: 0.346" (8.8mm) String post diameter: 0.236" (6mm) String post length to string hole: 0.827"; (21mm) Weight per single machine head: 0.055lbs (25g) Weight per set of six: 0.331lbs (150g) String diameter up to 72 gauge Includes 6 machine heads, mounting screws, and bushings
