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NES1300 External Rethreading Kit: 5/32" to 5" (4-128mm)
NES1A External Rethreading Tool: 5/32" to 11/16"( 4-18mm)
NES2 External Rethreading Tool: 11/16"to 1-1/2" (17-38mm)
NES3 External Rethreading Tool: 1-3/8"to 6" (35-152mm)
NES21 Internal Rethreading Tool: 5/16" to 7/16" (8-11mm)