The PRL-8311, 8322, 8331, 8341 are a right-handed sets of Locking RATIO® Calibrated Machine Heads for electric guitar that use 3 x 3 tuners, such as Gibson style and PRS style guitars.A great upgrade over a single gear machine heads, such as Grover, Schaller, Sperzel, Kluson, etc.RATIO® patented gear technologyRATIO® - Calibrated Machine Heads incorporate different string gauges into the tuning equation.From Low E to High E 39:1, 24:1, 20:1, 35:1, 20:1, 12:1.We balanced the gear ratios to each string simplifying the tuning process.With RATIO®, a half turn is a semi-tone!Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string.
Gear ratio: unique for each string position - one turn-one tonePeg holes diameter required: 13/32" (10mm)String post diameter: 0.236" (6mm)String post length to string hole: 0.910” (23mm)Weight per single machine head: 0.083lbs (38g)Weight per set of six: 0.496lbs (225g)String diameter up to 72 gaugeIncludes 6 machine heads, mounting screws and bushingsIncludes complimentary 4 sets of aluminum mounting plates