Ernie Ball 2214 Mammoth Slinky nickel wound electric guitar strings provide the heaviest gauge in the iconic Slinky line, designed for drop tunings from A to C. Mammoth slinky strings deliver a powerful low end and thick tone for metal and hard rock players who want optimal tension and definition. You'll get the familiar nickel-plated steel wrap and hex core that provides the signature slinky feel and tone Ernie Ball is known for.