Nut (Bone, Tusq or Carbon) - Over time the slots in a nut wear down causing
buzzing on the frets. When this happens the nut should be replaced
in new guitars soft plastic nuts tend to be sticky, making the guitar hard
to keep in tune. Replacing the nut with hard bone, carbon or Tusq will
make tuning and keeping the guitar in tune easier.
Carbon and Tusq nuts also contain natural lubrication which
helps the strings stay in tune, especially on a guitar with a tremolo.
and Tusq nuts are available in several popular profiles however when a
profile is not available to suit a particular instrument a custom bone nut
needs to be made.