D'Addario EHR Half Rounds are truly unique feeling electric guitar strings. They are round wound with stainless steel and then precision ground, which leaves the outer surface smooth and semi flat. D'Addario say that the strings have the bright tone and familiar tension characteristics of round wound strings with the smooth feel of flatwound strings. Great for blues and jazz, or if you're looking for a set of strings that go a little easier on the fingers!