Featuring a revolutionary diamond coating and a round “string-shape” blade design, this MusicNomad 300 Grit Nut File is designed to deliver smooth, precise cuts. With the ability to cut and polish slots simultaneously, this nut file doesn’t drift like common toothed files. The industrial-grade diamond coating cuts all nut or saddle materials such a nylon, bone and graphite, while an ergonomic handle provides total comfort and control of the cut.