The Ernie Ball Skinny Top Heavy Bottom 7-String 2615 Nickel string set is a versatile choice gibing you the best of both worlds – a light expressive top end and a thick defined low end. Built on the trusted Slinky formula this set is ideal for modern lead work fast fretting and articulate soloing across the high strings. The heavier bottom gauges give you the tension and punch needed for tight rhythms and aggressive low-end chugs all while maintaining tuning stability. With nickel-plated steel wrapped around a hex core and high-carbon steel plain strings you get a bright balanced tone that lasts through every session.