GHS Electric Guitar Steinberger Boomers 9-42 DB-GBXL .009 .011 .016 .024 .032 .042 - set / E-GuitarFor StandardSteinbergersystems.Nickel-plated steel roundwoundHexagonal coreDouble Ball EndExtra Light GaugeMade in USAThe Double Ball End sets are designed to work with many popular tremolo systems.TheDB coded sets were made to exclusively work with standard and licensed Steinberger system guitars,while the TT coded sets are made for both Trans-Trem and Steinberger equipped guitars.