FU-Tone.com is proud to bring you this revolutionary new Locking Nut! I have always loved the sound of a brass nut upgrade on Strats and Les Paul’s. Brass is an inherently soft material and would not make the best locking nut based on the job it needs to do… This got me thinking and after experimenting with several different alloys, I finally found the right version of “Naval Brass” that does the job of locking the strings in place and giving the sound of the classic brass nut! FU-Tone is the ORIGINAL tremolo upgrade company. I saw some moron trying to sell a failed sample part out there… Beware of imposters and lame jokesters… Use What The PROS Use!