The PRN-2411/21 the right-handed sets of RATIO Calibrated Machine Heads for acoustic guitar that use 3 per side tuners. The balanced gear ratios to each string simplify the tuning process.
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The Graph Tech PRN-2411 and PRN-2421 are the right-handed sets of RATIO® Calibrated Machine Heads for acoustic guitar that use 3 per side tuners in Black.
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