7pc set rethreading right hand, fractional, fine thread hexagonal re-threading dies. set includes 1ea 1/4", 5/16", 3/8", 7/16", 1/2", and 9/16" rethreading dies. for repairing damaged bolts or studs. will not crosscut or undercut the thread the way a cutting die will. do not use on hardened threads for to cut new threads. made from high carbon alloy steel for a long tool life.

• Rethreading hexagon dies for repairing damaged bolts or studs
• Rethreading dies are made from high carbon alloy steel for a long tool life
• 7 piece National Fine rethreading set includes 1/4-inch 5/16-Inch 3/8-Inch 7/16-Inch 1/2-Inch 9/16-Inch and 5/8-Inch
• Rethreading sets right hand
• National Fine