NECKLACE UNIVERSAL NECKLACE NS CAPO PRO SILVER Silver finish. Thanks to its revolutionary FlexFit technology, the part of this nut that comes into contact with the strings adapts automatically and naturally to any type of guitar, string gauge and fingerboard radius, thus imitating a human finger and minimizing fretting. , noises and dead notes. With hardly any pressure on them, the NS Capo nut provides just the right pressure for each string to be heard cleanly, clearly and without variations in intensity or tuning.