Music Nomad's TUNE-IT Lubricant features a pro-strength, biodegradable formulation like no other and contains anti-wear, anti-oxidants, anti-corrosion additives fortified with PTFE. Odorless, non-staining, and silicone-free, this lubricant is great for moving parts, such as open tuners and tremolo bars. Most importantly, it does not affect the sound of the strings. Apply to Nut Slot, Bridge, Saddle, and String Guides every string change, and stop tuning between every song. Music Nomad's TUNE-IT is your personal guitar tech to stay in tune longer and reduce string breakage. A little goes a long way to help you sound the best.