R+RL Light Nickel Rockers for electric guitars from GHS provides guitarists with the pure-nickel sound of early rock and roll, and the warm tones of blues and jazz. The Nickel Rockers are made with a quality steel core wire which is wrapped in a round, pure nickel cover, then slightly flattened by computer-controlled precision rollers during the winding process. These semi-flat strings deliver a warm, articulate tone, and a smooth, comfortable feel with a "touch" of extra tension.