D'Addario EXL110 guitar strings feature nickel plated steel round wrap over a hex core, to provide excellent magnetic characteristics for single coil and dual coil pickups. Nickel plated steel wire is precision wound over steel hex cores, using computer controlled winding machines to monitor wrap speed and tension. The result is a string with precise intonation and unmatched consistency, set after set. Though round wound, EXL110's have a smooth feel, which is easy on the fingers and reduces fret wear. This light gauge set is easy to bend for blues, rock, rockabilly, and general for rhythm and jazz. They can produce plenty of volume and have a full spectrum tone, form deep basses and warm mids to very bright, ringing trebles. If you've ever seen or heard Brian Setzer play, then you know what these strings can do. They're truly amazing performers, and a lot of string for the money. Why pay more for less? Buy D'Addario.