12-Pc Diamond Coated Round Micro Files The 12-piece set of round files, ranging from .030 to .120, are designed with gunsmiths in mind, and offer incredible versatility A total of 10 sizes with duplicate sizes in the 0.030" and 0.040" range Smaller sizes for deburring barrel threads Larger sizes for cleaning barrel porting Each file is conveniently marked or color coded with the size