Addresses frustrating tuning issues found on many guitars with a 3 + 3 headstock configuration. | The String Butler’s Patented 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! | This durable, all metal, chrome plated, guitar accessory is designed assembled in Germany and ready to provide you with many years of trouble free service. | The rollers used on this guitar upgrade insure low friction as the strings are rerouted to the tuning machine heads.