Graph Tech Ratio In-Line Retro Fender-style tuning machine heads deliver predictable, precise tuning on every string. Graph Tech balanced the gear ratios to each string to simplify the tuning process. With Ratio 6-in-line tuning machines, a half turn is a semi-tone. Every string reacts the same to any tuning adjustment. The Graph Tech PRN-4624 is a right-handed set of open Ratio calibrated retro-looking machine heads for electric guitars that use 6-in-line tuners. The Graph Tech Ratio in-line retro Fender-style tuners fit vintage-style guitars.

As a note, Graph Tech’s retro tuners are made to a vintage specification (for 11/32" peghead holes) and will not be a direct replacement for a modern tuner.