Hi-Beam Stainless Steel Bass Strings from DR are roundwound and constructed on a round core, which is unique in the industry. Hi-Beams require much more time, care, and extra steps to make than other bass strings. The extra effort DR expends making Hi-Beam strings results in a bass string that is highly flexible; musically bright without harshness; and bass strings that are renowned for unusually long life, consistency, and string-to-string balance. They don't eat your frets. Choose them for brightness and ease of playing. They fit virtually all bass scale lengths up to 37-3/4".