Addresses frustrating tuning issues found on many guitars with a headstock configuration. The 's Design attaches to the head of your guitar and corrects the angle of the strings as they pass through the nut. This guitar mod greatly improves the tuning stability of your guitar and it looks fantastic doing it! The rollers used on this guitar upgrade insure low friction as the strings are rerouted to the tuning machine heads. Colour:Black Material:Metal Package Contents: 1 x Guitar Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.