The #2-56 thread repair kit allows for the removal and repair of damaged threads in a tapped hole. They can be replaced by chasing the threads using a thread chaser (a device designed to clean and restore factory threads) or installing an insert that contains new threads of the same size.
909226662_max.jpg
Trade Series Thread Repair Kit, Thread Size #2 - 56 UNC, 2-Way Tool, Tap, Bit, Tang-brk, Inserts (1.5d) 15 PC ea
Orion Motor Tech Helicoil Thread Repair Kit, 1/4-20
Orion Motor Tech Helicoil Thread Repair Kit, 1/4-20
Pikwo 338Pc Thread Repair Kit, HSS Drill Helicoil
Orion Motor Tech Helicoil Thread Repair Kit, 1/4-20
Orion Motor Tech Helicoil Thread Repair Kit, 1/4-20
3/4-16 Thread Repair Kit - HD Chasen Co
Trade Series Thread Repair Kit, Thread Size #2 - 56 UNC, 2-Way Tool, Tap, Bit, Tang-brk, Inserts (1.5d) 15 PC ea