Vintage American-made thread file used for restoring damaged external threads. Marked Jam Mfg. Co., Reading PA and Made in U.S.A. Includes the original paper sleeve with printed instructions. Features multiple thread pitches ranging from 11 to 24 threads per inch, ideal for machinists, mechanics, automotive work, or tool collectors. A solid, well-made vintage shop tool that still has plenty of life left.
eBay