The PRN-4424 are the right-handed sets of open RATIO® Calibrated Machine Heads in a retro look for electric guitars that use 3 3 side tuners.

Fit vintage-style guitars.

Please note that GraphTech retro tuners are made to a vintage specification (for 11/32” peghead holes) and will not be a direct replacement for a modern tuner. Please check the specifications below.

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: 0.056lbs (25.5g)
Weight per set of six: 0.337lbs (153g)
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings