Set 1a+21+22 & spare blades

External and Internal Adjustable Thread Restorer
- Quickly adjustable to any thread diameter and pitch within the size range indicated on the tool
- Applicaple to most kinds of thread- inch, metric, RH or LH, fine or coarse
- Advantage over taps is the ability to begin within a damaged thread and work in an outward direction
- No measuring of thread needed
- Diameter range:
-- External M4 - M19 5/32" - 3/4"
-- Internal M8 - M16 5/16" - 5/8"