STRING INSTRUMENT REPLACEMENT Lubrikit by Planet Waves provides tuning stability by eliminating friction. As all musicians know, friction is the root cause of all tuning problems. Apply a drop of Lubrikit to the nut and tremolo / bridge to optimize tuning stability, fight string breakage and eliminate premature wear on the bridge and nut of the instrument. Field tested with industry technicians and luthiers, Lubrikit is the easiest way to end tuning problems from the source. Lubrikit comes with a lubricant syringe and two application swabs.