Ernie Ball Hybrid Slinky Electric Strings are a perfect match for those who like the ability to combine the combination of Super and Regular Slinkys. These strings are precision manufactured to the highest standards and most exacting specifications to ensure consistency, optimum performance, and long life. Hybrid Slinky 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.