Dunlop and Zakk Wylde worked together to deliver this set of strings, developed to withstand the punishment of the reigning Berzerker of Metal Guitar. Painstakingly engineered and put through critical road testing by Zakk himself, Zakk Wylde String Lab Artist Series Acoustic Strings feature True Balance technology for comfortable string-to-string balance, superior definition, and unwavering pitch retention at any tuning.