XL Nickel Wound electric guitar strings are the standard by which all other strings are measured. XL Nickel, our top-rated electric set, has been adored by gamers around the world since 1974. Constructed with a carbon steel core and nickel-plated steel winding wire, the XL Nickel strings have a bright, versatile sound, ideal for a variety of musical styles. This 10.5-48 Regular Light Plus set is the ideal addition to transitioning from 10 to 11 gauge sets and is great for balancing tension between guitars with different scale lengths.