XT strings feature long-lasting treatment on each string in the set, preserving the natural tone and feel of uncoated strings. Carbon steel wire and fusion twist technologies provide unmatched tuning stability and break resistance. Strings last at least 4 times longer than traditional uncoated strings. The inner packaging has a resealable zipper closure for easy opening and storage of unused strings. Each set includes a players circle code for product identification, registration, and authentication. Musicians can earn points to redeem for D'Addario product gifts and merchandise. XT Electric Nickel Plated Steel strings combine our most popular electric guitar alloy with long-lasting treatment on each string in the set, preserving the natural tone and feel of uncoated strings. Available for 6-string electric guitars in super light to light gauges in treble/bass to cover various playing styles and preferences. D'Addario XT strings have carbon steel cores with long-lasting treatment on each string in the set, providing increased break resistance, tuning stability, and lasting performance, all while preserving the tone and feel of your favorite uncoated strings. These strings are made to last, for a performance that never fades.