This directly replaces the tailpiece on Gibson/Epiphone Les Pauls, 335s and SG type guitars, or any other with the same stop bar. Well finished, complete with studs and bushes if needed for a new-build, this Gibson TP-6 allows you to literally fine-tune your guitar, having first adjusted the headstock tuners. By turning the knurled screw heads (which act upon levers holding the ball-ends) you bring the strings up (preferably, or down) to pitch with much more accuracy than the less-sensitive headstock tuners permit. Helps with sure setting of Intonation. Much easier to correct a string whilst playing.