D’Addario XT Phosphor Bronze Coated Acoustic Guitar Strings offer warm, well-balanced tone and more, boasting enhanced break resistance, better pitch stability and longer life than standard Phosphor Bronze strings. The XT coating delivers advanced corrosion-resistance, while still retaining the warm tone and natural feel of the uncoated string. Beneath the coating, these XT acoustic strings are constructed with a NY Steel core, Phosphor Bronze wrap wire and Fusion Twist technology, affording tonal versatility with added resilience, excellent for a wide range of acoustic styles. This 11-52 Custom Light gauge set has slightly more volume and projection than Extra Light, while still being easy to play. D’Addario XT strings feature high-Carbon steel cores with an advanced corrosion resistance treatment on every string in the set, giving you enhanced break resistance and unyielding pitch stability – all while preserving the tone and feel of your favourite uncoated strings. These strings are made to stay, with uncompromising performance that never fades away.