●Suitable for the restoration of external threads. ●220mm Double end files each supplied with reversible grip. ●Metric: 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3mm Pitch. ●Use to restore external threads by filing. ●Simply overlap with file, and file damaged ones. ●Files both right-and-left-hand threads.