Power Slinky Nickel Wound strings for electric guitar. Gauges: 011 - 014 - 018 - 028 - 038 - 048. They are perfect for those who like robust rhythms, for rock&roll, or blues. Power Slinky has long been popular with bands like Slash, Metallica, Kenny Wayne Shepherd. They are made of nickel-plated steel wire wrapped around a hexagonal core. They create a well-balanced tone for your guitar and have a long life.