Lang Tools, 5-pc Metric thread restorer die set

For external threads. Incl. M6x1.0 M8x1.25 M10x1.50 M12x1.50 M12x1.75. Used to restore damaged external threads. This are special threaded restoring dies 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.