D'Addario NYXL guitar strings are designed to bend farther, sing louder, and provide more tuning stability than any strings out there. Developed and manufactured by D'Addario in New York, their break-resistant high-carbon steel core and plain steel alloy sets a whole new standard for string performance. NYXL's are made using a completely reinvented wire drawing process and revolutionary corrosion-resistant tin coating application resulting in vastly superior strength and stability. The reformulated nickel-plated string windings have greater magnetic properties resulting in higher output and enhanced mid-range frequency response for more presence and crunch.