This is a set of 3 gold-plated string retainers for guitar, cigar box guitar and more. These are used any time you want to pull the string height down before they cross the nut, to help with break angle and get better string tension. These are especially good if you are building cigar box guitars without angled headstocks, which often have troubles with string height and break angle.
A set of three of these will handle 6 total strings (each retainer handles two strings). Two different size spacer bushings are included so you can customize your string height as needed. Mounting screws are also included.