Graph Tech Ratio PRL-9721-B0 Locking Calibrated Machine Heads – 6-in-line Black

Graph Tech Ratio PRL-9721-B0 Locking Calibrated Machine Heads – 6-in-line Black

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. They 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.

The PRL-9721 is a right-handed set of Locking RATIO Calibrated Machine Heads for electric guitar that use 6-in-line tuners with staggered posts (eliminates the need for a string tree). 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.

6-in-line tuners set Staggered tuners set Ratio Tuned Machine Heads: The New Standard In Tuning Technology

Features:

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: 0.827 (21mm) – 0.787″ (20mm) – 0.748″ (19mm)
Weight per single machine head: 0.083lbs (38g)
Weight per set of six: 0.496lbs (225g)
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings
Includes complimentary 4 sets of aluminum mounting plates