The Ernie Ball Beefy Slinky Nickel Wound 11-54 electric guitar strings 3-pack features individually sealed sets for lasting protection and better storage. These packs provide a convenient, cost-effective solution if you are buying multiple sets at the same time, while still ensuring each set stays as fresh as possible. Beefy Slinkys are made from nickel-plated steel wire wrapped around tin-plated 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. Ernie Ball strings have been the premier choice for musicians around the world for over 60 years.