The TonePros AVT2G is a high quality wrap around bridge featuring individually intonatable saddles and their SS1 Locking Studs. The SS1 studs have a threaded cap that screws in to the bridge post tightening down on to the top of the bridge locking it to the post from above, ensuring the bridge does not lean on the posts and ensures maximum sound transmission. Imperial threads designed to replace USA Gibson wrap around bridges.