I BOUGHT THIS SET OF STRINGS SO I WOULD HAVE A REPLACEMENT SET.  I CAN'T COMMENT WITH AUTHORITY UNTIL I MUST REPLACE THE CURRENT STRING ON MY UKE.  EVEN SO, I'VE OWNED A MARTIN GUITAR, A MARTIN SOPRANO UKULELE, AND A MARTIN TIPPLE (10 STRINGS), AND I NEVER HESITATE TO TRUST I'M MAKING A GOOD BUYING DECISION WHEN GOING FOR THE MARTIN BRAND.