[Easy to Use] Suitable for left-hand or right-hand thread. The operation is simple, a few minutes of work can allow you to easily fix the thread and tighten the nut. [Size] There are 8 different metric thread files in - 0.75 / 1.0 / 1.25 / 1.5 / 1.75 / 2.0 / 2.5 / 3.0 mm. [Thread Repair File] Designed to repair damaged external threads on studs, bolts, screws, pipes and fittings. [Quality Material] The steel after heat treatment has high hardness and black oxide coating on the to prevent rust. It is and not become dull after hundreds of times of use. [Thread Repair File Handle] The handle can be turned over, the detachable rubber sleeve is easy to slip off, and it can be switched as Only suitable for external threads, not for internal threads., Manufacturer: Akfldms