D’Addario EPS520 Pro Steels



EPS520’s offer a super-bright, crunchy tone and corrosion resistance for longer string life.

D’Addario XL ProSteels utilize an exclusive corrosion-resistant steel alloy that delivers super-bright tone without shrill overtones. They offer a palette of harmonically rich, brilliantly penetrating highs combined with pronounced, tight-and-tough lows. If you’re looking for more crunch, bite, and sustain, ProSteels are the choice for you.


  • Super Light gauge
  • Exclusive corrosion resistant steel alloy offers brighter, crunchier tone and increased sustain
  • Environmentally friendly, corrosion resistant packaging for strings that are always fresh
  • Made in the U.S.A. for the highest quality and performance
  • String Gauges: Plain Steel .009, .011, .016, ProSteels Wound .024, .032, .042