The NS Capo is the product of an ongoing collaboration between famed product designer Ned Steinberger and J. D'Addario & Company. It employs a sleek, ultra-light design for fast and accurate one hand positioning on the guitar's neck. Just turn the smooth, tactile dial to eliminate the string buzzing and enjoy perfect, in-tune performance. Lightweight aluminum adds virtually no weight to the guitar's neck when in use. Ultra-light aerospace grade aluminum. One hand operation. Fast micrometer screw assures perfect pressure for buzz-free, in-tune performance at every fret. Designed for 6- or 12- string guitars