D'Addario uses a high-carbon steel core with a unique fusion twist process for the plain strings. NYXL's reformulated nickel-plated string windings have increased magnetic properties that give you higher output and juiced midrange for greater presence and crunch. If you're dissatisfied with your electric guitar strings, give D'Addario NYXL strings an audition. You'll be impressed.

D'Addario NYXL1059 Electric Guitar Strings Features:

Built around the most popular 7-string string gauges
.010, .013, .017, .026, .036, .046, and .059 diameter
Excellent presence and crunch let you cut through the mix
High-carbon steel alloy for unrivaled strength and elasticity
Improved tuning stability compared to traditional nickel wound strings
Wound strings with enhanced midrange frequency response in the 1kHz-3.5kHz range
NYXL is manufactured in D'Addario's New York factory

D'Addario NYXL 10-59 7-String Set