HI-BEAMs are stainless steel electric bass strings, spun round around a round core. They take more time, attention and steps to make than other strings. But these efforts allow DR to offer strings that are very flexible, musically brilliant (not garish) and known for their strength, exceptional longevity and balance from string to string. In addition, they do not wear out your frets prematurely. For brilliance and ease of play, choose HI-BEAM strings!