Newtone Master Class Double Wound Acoustic guitar strings use a double wrap of phosphor bronze on a round steel core wire. This process lends these strings a feel and sound all their own. These Newtone acoustic guitar strings have a mellow and warm tone and the double wrap helps eliminate the finger noise associated with single wrapped strings. Choose from six 6-string sets in gauges from .011 - .050 to .013 - .056. Very important: Do not cut these wound strings to a desired length without first making a sharp bend into the string behind the cutting point or until the string is secured and tuned to pitch. Without either of these, the string will unravel.