XS nickel-coated electric guitar strings offer the longest lifespan of all D'Addario electric guitar strings. Coated with our groundbreaking XS coating, these premium electric strings achieve maximum durability and a smooth, fast playing feel without compromising their excellent tone. Constructed with a NY steel core, newly formulated nickel-plated steel winding wire, and Fusion Twist technology, XS Nickel strings provide superior strength and tuning stability, as well as richer overtones, greater clarity, and remarkable definition with every sweep, slide, and bend. This 10-46 Regular Light Gauge set is our most popular gauge, offering a nice balance of tone and playability. XS breathes new life into coated strings. With its ultra-thin film coating on each wound string and unique polymer treatment on the plain steels, XS provides our highest level of protection for maximum lifespan with an unusually smooth feel. XS also features a carbon-rich NY Steel core and smooth string wire, along with our exclusive Fusion Twist for unmatched break strength and tuning stability. XS is the most innovative coated string ever developed.