PREFERRED BRAND - Ernie Ball strings have been a top choice for players of all types since the early 1960s, when guitarists came into Ernie Ball's music store, customizing their string gauges to make their axes easier to play. GREAT FOR EVERYONE - Ernie Ball Power Slinky Nickel Wound Bass Strings are heavily used by both amateurs and professional musicians. SIGNATURE SOUND - Made from nickel plated steel (NPS) windings wrapped around tin plated, hex shaped steel core wire, Slinkys produce a well balanced, all-around great sound, no matter what your playing style. EASY TO USE - This top-quality string winder boasts a compact design with a comfortable grip, complete with a non-abrasive socket head that leaves your tuning keys clean and unmarred. MULTI-FUNCTIONAL - This particular Ernie Ball Pegwinder features a larger socket that works on standard guitar tuners, but also accommodates the extra-large keys often found on bass guitars.