Hipshot Grip-Lock 7 String 4x3 Locking Tuners - Black Go to amazon.com Related posts Top recommendation for locking tuners 3x3 Feature7 String 4x3 Black locking tuner set, 18:1 Ratio DescriptionGenuine Hipshot Griplock 7 String 4x3 Black locking tuner set, 18:1 Ratio. 7th String max gauge 0.080"