Feature(may vary by option.)

●Precision cut threads, accurately formed for consistent, exact rethreading
●For repairing damaged threads on bolts or studs
●Will not crosscut or undercut the threads as a cutting die would
●7 piece National Coarse rethreading set includes 1/4" 5/16" 3/8" 7/16" 1/2" 9/16" and 5/8"
●National Coarse

[7-Piece Fine]

[5-Piece]

[7-Piece Coarse]

Description

For repairing damaged threads on bolts or studs. Will not crosscut or undercut the thread the way a cutting die would. Do not use on hardened threads or to cut new threads. Made of high carbon alloy steel for a long tool life.