5 piece Diamond File set had 4 different high quality files plus a round reamer file. Every one working with metals and stampings needs quality tools to make your quality of work better. Milled steel coated with industrial diamonds for precision filing. Diamond particles are electroplated onto the surface of the metal to assure longevity and performance. Only available as a set. 140-160 grit: flat, three-square, half round, square and round5 piece Diamond File set had 4 different high quality files plus a round reamer file. Every one working with metals and stampings needs quality tools to make your quality of work better. Milled steel coated with industrial diamonds for precision filing. Diamond particles are electroplated onto the surface of the metal to assure longevity and performance. Only available as a set. 140-160 grit: flat, three-square, half round, square and round