LOKNOB LARGE TOUR CAP CTS-BLACK PEDAL ACCESSORY. BIG extra secure BLACKSTAR lock for potentiometer type CTS. Store and lock the settings on your pedals, instruments, amps and studio gear with the Loknob Tour! Simple, without tools or manuals. Just remove the original knob from your kit's potentiometer, adjust it to the desired point and place the threaded Loknob Tour on top. As simple as that! Your potentiometer will be protected from friction, vibrations and shocks during transport or handling on stage. If you want to change the control setting, just unscrew your Loknob Tour, adjust the new position and screw it back on.