GraphTech RATIO Electric Locking 7-in-Line Mini Contemporary Machine Heads ~ Chrome

The PRL-8721-C7 is a right-handed set of Locking RATIO® Calibrated Machine Heads for electric guitars that use 7-in-line tuners.

It has a two-pin casing that can be used as is, or with our Patented InvisoMatch Mounting Plates [opens in new tab].

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.

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: 0.910 (23mm)¨
Weight per single machine head: 0.083lbs (38g)¨
Weight per set: 0.581lbs (266g)
¨String diameter up to 72 gauge
¨Includes 7 machine heads, mounting screws, and bushings¨Includes complimentary 4 sets of aluminum 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, 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.