Lang Tools, 7-pc UNC thread restorer die set

For internal threads. 7-pc UNC (coarse threads). Incl. 1/4″-20 5/16″-18 3/8″-16 7/16″-14 1/2″-13 9/16″-12 5/8″-11. Used to restore damaged internal threads. This are special threaded restoring taps that ensure a good result and they are safer in restoring threads than using regular thread cutting taps and dies. Regular cutters are sharper and can easily further damage existing threads. Packed in a re-usable clamshell package. USA made. Note: Not suitable for cutting new threads.

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