Strings for electric bass guitar Ernie Ball - Beefy Slinky. Ernie Ball Nickel Wound Electric Bass Strings are made from nickel plated steel wrapped around a hex shaped steel core wire. Each bass guitar string produces a bright, balanced tone and manufactured with the finest and freshest raw materials. Strings designed for ultra-low tuning including BEAD, Drop B and Drop C. Beefy Slinky features low end tone, tuning stability and excellent feel.