49PCS Thread Repair Chaser Tool UNC UNF Metric Thread Restorer Kit is specially designed to repair worn and damaged threads, removing stubborn dirt and corrosion without breaking the integrity of the metal. It can efficiently chases threads on rusty fasteners, bolt holes on automotive cylinder heads, engine blocks, and vehicle bodies. 3 colors of the thread restorer set : silver (UNC), black (UNF), and gold (metric), which is easy for you to distinguish . The thread chaser kit and each holes of the box are marked the specification, which can help you to find the right one you need quickly.

【22PCS Rethreading Taps and 24PCS Rethreading Dies】UNC(Silver): 5/8”-11, 9/16”-12, 1/2”-13, 7/16”-14, 3/8”-16, 5/16”-18, 1/4 ”-20; UNF (Black): 5/8”-18, 9/16”-18, 1/2”-20, 7/16”-20, 3/8”-24, 5/16”-24 , 1/4”-28; Metric (Gold): M14x1.5, M12x1.75, M12x1.5, M12x1.25, M11x1.5, M10x1.5, M10x1.25, M10x1.0, M8x1.25, M6x1 .0. 【3PCS Thread Files】SAE Thread File: 9 - 10 - 12 - 16 - 20 - 27 - 28 - 32; SAE Thread File: 11 - 12 - 13 - 14 - 16 - 18 - 20 - 24; Metric Thread File: 0.75mm - 1.0mm - 1.25mm - 1.50mm - 1.75mm - 2.50mm - 3.00mm

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