Keeled

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.

XL ProSteel electric bass strings utilize a stainless steel wrap wire, enhancing the strings' interaction with magnetic pickups, producing a distinctively bright and present tone. 

D'Addario Half Rounds are round wound with Pure Nickel and then precision ground, leaving the outer surface smooth and "semi-flat." The result is a string with the tone and tension characteristics of round wound strings with a smoother feel, similar to flat wound strings.

XL Half Round strings delivers a smooth feel and reduced finger noise, with tone that's comparable to round wound strings.