Gauges 009-011-015-024-032-042 Yngwie's strings were manufactured to Yngwie's personal specifications for that maximum speed, tone, and playability he demands from his strings. Their special core-to-wrap ratios and custom gauging are especially suited for fast solos and incredible tone and sustain. They are constructed from the highest quality nickel steel available, and offer world class performance—set after set. These incredible strings were custom made for an incredible player. If you like Yngwie's masterful style, you're going to love these strings!