Stainless Steel Bass Strings wound on Round Cores Hi-Beam stainless steel bass strings are round wound and constructed upon 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-Beams results in a bass string that is highly flexible, musically bright (not harshly bright) and renowned for durability,unusually long life, consistency, and string-to-string balance. They don’t eat your frets. HI-BEAMS are the string to choose for brightness, punch and ease of playing.