The Pro Series Diamond Coated Micro File set includes 12 individual files ranging in size from .030" -.120". Each tool features a diamond abrasive coating for precise filing and durability. These files are incredibly versatile, and come in handy for general parts fitting as well as many specialty applications including removing material from spring/detent channels for lower receiver builds, and deburring drilled holes when seating barrel tenons. Small sizes can also be used to deburr barrel threads and larger sizes are handy for cleaning barrel porting. The set covers a total of 10 sizes with duplicate cleaners in the 0.030" and 0.040" range. Each file is mar Mfg: Ramrodz Inc. SPECS: Sizes: .030"-.040" x2, .040"-.050" x2, .050"-.060", .070"-.080", .080"-.090", .090"-.100", .100"-.110", .110"-.120", .120"-.130".