Ernie Ball Beefy Slinky Electric Strings are perfect for those who like to detune their instrument to lower tuning combinations. Metal fans worldwide have gravitated towards the Beefy Slinky set to give their guitar the optimal gauge combination for Drop D & Drop C tuning. The wound strings are made from nickel-plated, steel wire wrapped around a hex-shaped steel core wire. The plain strings are made of specially tempered, tin-plated, high-carbon steel, producing a well-balanced tone for your guitar. All Ernie Ball strings are precision manufactured to the highest standards and the most exacting specs to assure consistency, optimum performance, and long life. Ernie Ball is a pioneer of rock and roll guitar strings. Jimmy Page, Eric Clapton, Steve Vai, and Slash are among the long list of Slinky players. Gauges: 11-15-22p-30-42-54.