【2Pcs Thread Files】The rethreading set includes 2 thread repair files. SAE File: 9, 10, 12, 16, 20, 27, 28, 32. SAE File: 11, 12, 13, 14, 16, 18, 20, 24. The thread chaser kit and each holes of the box are marked the specification, which can help you to find the right you need quickly.