5pc Round Diamond Needle File Set - 3x140mm - 5 Grit Ratings Mini needle file set for fine detail work in five different grit ratings: 80, 120, 150, 200, 300 Hardened steel shafts with non-rust nickel finish, embedded with industrial diamonds World's hardest abrasive surface - effective on hardened steel, glass, tile, stone Each file unique shape to cover full range shaping, forming, carving, engraving & material removal 140mm length x 3.0mm average-width allows access in really tight fits; non-slip PVC-dipped handles - Includes vinyl storage pouch