This is the TonePros Nashville style set. This bridge and tailpiece combo gives you exactly what you need to retro-fit your guitar with the patented TonePros locking hardware, bringing your guitar into the 21st century. TonePros’ locking capabilities not only increase sustain and resonance of the entire guitar, but overall improved construction make TonePros bridges and tails 100% totally reliable with virtually no saddle play. TonePros delivers intonation perfection and the rock hard stability that you can count on.