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Graph Tech Guitar
Ratio Electric 6-In-Line Tuned Machine Heads - Classic Style, Black
Item ID: PRN-2731-B0

List Price: $149.49


The PRN-2721 and PRN-2731 are a right-handed sets of RATIO® Calibrated Machine Heads for electric guitar that use 6-in-line tuners. It has a two pin casing that can be used as is, or with our Patented InvisoMatch Mounting Plates. 4 different sets of InvisoMatch mounting plates in brushed aluminum are included to make installation on most guitars fast and accurate by using your existing screw mounting holes.
  • RATIO patented gear technology
  • RATIO - 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 tone
  • Peg holes diameter required: 13/32" (10mm)
  • String post diameter: 0.236" (6mm)
  • String post length to string hole: 0.890” (22.6mm)
  • Weight per single machine head: 0.066lbs (30g)
  • Weight per set of six: 0.393lbs (179g)
  • String diameter up to 72 gauge
  • Includes 6 machine heads, mounting screws and bushings
  • Includes complimentary 4 sets of aluminum mounting plates