Select the correct size thread, overlap the file on a few good threads and use the tool just like a file to restore damaged area. Works on all diameters, right or left hand threads.

Set Contains:

Item No. Thread File Sizes Length
8001 11, 12, 13, 14, 16, 18, 20, 24 tpi 8.1/2" (220mm)
8002 9, 10, 12, 16, 20, 27, 28, 32tpi 8.1/2" (220mm)
8008 0.75, 1.0, 1.25, 1.5, 1.75, 2.0, 2.5, 3mm 8.1/2" (220mm)
8031 SAE Thread Gauge 2.5/8" (67mm)
8033 Metric Thread Gauge 2.5/8" (67mm)
Barcode # 9322159980141