21Pcs Dies sizes -- UNC sizes (silver) : 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8". UNF sizes(black): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8". UNF sizes(black): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16".
Pro Thread UNC Coarse Thread Repair Kit 1/2-13 Inch Thread Repair Kit
Thread Repair Kit M6 X 1.0mm, Helicoil Metric Thread Repair Insert Kit with H...
M10 x 1.5 Thread Repair Kit Metric Helicoil Thread Repair Kit with HSS Drill ...
5/16 18 Inch Thread Repair Kit HSS Drill Helicoil Repair Kit SAE Thread Inserts
Helicoil Thread Repair Kit, 5/16"-18 Thread Repair Tool Set with HSS Drill Bi...
Helicoil Thread Repair Kit, M10x1.25 Thread Repair Tool with HSS Drill Bit 1...
