Music Nomad's TUNE-IT is your personal guitar tech to stay in tune longer and reduce string breakage. This biodegradable formulation is like no other and contains anti-wear, antioxidants and anti-corrosion additives fortified with PTFE. Odorless, non-staining and silicone free, TUNE-IT can be applied to Nut Slot, Bridge, Saddle and String Guides every string change. Most importantly, it does not affect the sound or sustain of the strings. It's great for moving parts, such as open tuners and tremolo bars. A little goes a long way to help you sound the best.