Tap Thread Restorer UNC Set

• For repair of damaged internal threads on nuts.
• Chase out damaged threads and remove nicks and burrs without undercutting good threads.
• Use with a standard wrench and light oil.
• Sizes: 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12.