The PRL-8421-C0 is a right handed set of Locking Ratio Tuned Machine Heads for a Music Man, Sterling by Music Man, or other 4x2 style headstock. It has mini contemporary buttons, a two pin casing.
4 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. Premium sets of plates in chrome and gold are available separately.
Ratio - Tuned Machine Heads incorporate different string gauges into the tuning equation. From Low E to High E 39:1, 24:1, 20:1, 39:1, 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.