Locking tuners are a popular upgrade with PRS Guitars. They improve tuning stability and make string changes a breeze. And now, thanks to PRS SE Locking Tuners, you can install tuning machines that are tailor-made for your instrument. These tuners install effortlessly — they're a direct replacement for your current tuners. PRS SE Locking Tuners are a must-have upgrade for your PRS SE guitar.