Fits all true 80's Gibson stoptail Tune-o-Matic inserts. The stoptail is shown from both directions so you can see that it has the string wraparound capabilities over the tailpiece adding more sustain. Some folks like that wraparound technique. But you can use it the normal way as the string ball holes are on both sides of the stopbar. Brass is hands down the best musical conductor in the world! Sonic brilliance and bell tone chime. $19.00 each w/2 studs