Theres a good chance if youve heard of Uo-Chikyu (also known as Hiroshima Files) you either own some of their files or want to. Their reputation for making precision files used for slotting nuts and filing frets is unsurpassed among luthiers. We carry a wide selection of individual Nut Files. This is the costsaving and convenient set of eight. Sizes include 0.010", 0.013", 0.017", 0.024", 0.032", 0.036", 0.046" and 0.056". Made in Japan.