Ernie Ball Paradigm strings are guaranteed to be the most break resistant strings in the world. Paradigm strings demonstrate the incredible advancement in string technology by combining an industry-leading level of strength and durability with the highly regarded sound and feel of Ernie Ball strings. With ultra-high tensile steel cores and a plasma-enhanced winding wire treated with Everlast, these medium gauge Paradigma Phosphor Bronze strings give you all the benefits and none of the compromises.