The D’Addario NYXL Medium Top/Heavy Bottom 11-52 electric guitar string set is a hybrid, providing the high strings' moderate flexibility, with a booming, tight low end. NYXL strings offer higher break strength, enhanced tuning stability and accentuated midrange frequency response, providing more presence and crunch to cut through the mix. Made with an NY steel core, premium nickel-plated steel wrap wire and Fusion Twist technology, NYXL electric guitar strings are tough and versatile enough to handle whatever you throw at them.