24Pcs DiesThe thread chaser set includes 24pcs dies. National Coarse(NC) Sizes: 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11. National Fine(NF) Sizes: 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18, 5/8"-18. Metric Sizes: M6x1.00, M8x1.25, M10X1.0, M10x1.25, M10x1.50, M11X1.5, M12x1.25, M12x1.5, M12x1.75, M14X1.5mm 22Pcs TapsThe thread repair kit includes 22pcs taps. National Coarse(NC) Sizes: 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12. National Fine(NF) Sizes: 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18. Metric Sizes: M6x1.00, M8x1.25, M10X1.0, M10x1.25, M10x1.50, M11X1.5, M12x1.25, M12x1.5, M12x1.75, M14X1.5mm 3Pcs Thread FilesThe rethreading set includes 3 thread repair files. SAE File: 9, 10, 12, 16, 20, 27, 28, 32. SAE File: 11, 12, 13, 14, 16, 18, 20, 24. Metric File: 0.75mm, 1.00mm, 1.25mm, 1.50mm, 1.75mm, 2.00mm, 2.50mm, 3.00mm Material & Storage boxThe thread chaser set metric and standard is made of carbon steel material, making the thread chaser kit has better strong strength and durability. The hard box may protect rethreader kit from damage, and it is convenient for you to carry and store Easy to Distinguish3 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