Kluson String Tree Retainer Guide Electric Guitar Black
$5.99 each or Grab 2 for $10. 
These string guides (string trees) help minimize tuning problems and sympathetic overtones caused by low string tension.
Mount type is screw with guide pin
 Replacement for the Fender® American Standard® Series string trees part number 003-9475-049. 
These items may arrive without retail packaging as we stock small parts like this in bulk.
Love the Tone or Send it Home - No Fuss Refund or Exchange