This is the new locking version of the common Guitar Stud (tailpiece not included) as used on wrap-around style bridge and tailpiece combinations. Attaches solidly to your guitar and won't come loose or fall off when the strings are off. These TonePros System II components are the same that you will find installed on the top new guitars direct from the factory. The studs look identical to your stock pieces but will turn your wrap-around including Badass, Schaller 455, and Wilkinson bridge/tail combos into a solid, locking system. These new TonePros studs lock your existing Wrap-around solidly in place creating perfect intonation and singing sustain. Fits most guitars with wrap-around style bridges with standard SAE threaded inserts.