CURVED NUT (ACOUSTIC AND ELECTRICAL) Capo for acoustic guitar (6 or 12 strings) and electric Planet Waves NS Capo Silver. Result of the collaboration between the well-known product designer Ned Steinberger and J. D'Addario & Company, it uses an elegant and ultra-light design to achieve a fast and precise placement of the nut on the guitar neck with one hand. Tighten the rotary knob to remove the hum from the strings and maintain perfect tuning. The light aluminum of the nut makes it almost invisible on the neck when used. Lightweight aircraft-grade aluminum. One-handed operation. The fast micro-metric screw ensures perfect pressure for perfect tuning. Designed for 6 or 12 string guitars. A low profile design that does not prevent touching.