GraphTech RATIO Acoustic Guitar Locking 3+3 Vintage Machine Heads ~ Chrome

The PRN-8441 are right-handed sets of Locking RATIO® Calibrated Machine Heads for acoustic guitar that use 3 per side 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 aluminium are included to make installation on most guitars fast and accurate by using your existing screw mounting holes.

Gear ratio: unique for each string position - one turn-one tone
Peg holes diameter required: 10mm  /  13/32"
String post diameter: 6mm  /  0.236"
String post length to string hole: 23mm  /  0.910”
Weight per single machine head: 38g  /  0.083lbs
Weight per set of six: 225g  /  0.496lbs
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings
Includes complimentary 4 sets of aluminium mounting plates

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, 14:1, 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.