FLAT NUT (CLASSIC) Capo for Spanish guitar. Result of the collaboration between the well-known product designer Ned Steinberger and J. D'Addario & Company. It employs a sleek, ultra-light design for quick and precise capo placement 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. Ultra-light aircraft-grade aluminum. One-handed operation. The fast micro-metric screw ensures perfect pressure for perfect tuning. A low profile design that does not prevent touching.