Professional Thread Repair Tool Set This set of thread repair tools includes 7 metric thread taps, 7 metric thread dies, 1 metric repair tool file, and a plastic toolbox. It is perfect for creating new threads or repairing damaged threads on most metals such as cast iron, steel, aluminum, and copper. It can easily help you repair damaged external and internal threads on nuts, bolts, and studs. High-Quality Tools The professional thread repair tool parts are made of high-quality carbon steel, providing exceptional hardness and maximum durability. The thread kit includes 7 metric thread tap sizes: M6-1.00, M8-1.25, M10-1.25, M10-1.50, M12-1.25, M12-1.50, M12-1.75, and 7 metric thread die sizes: M6-1.00, M8-1.25, M10-1.25, M10-1.50, M12-1.25, M12-1.50, M12-1.75. Wide Applicability The hexagonal drive head allows it to be used with standard metric sockets, ratchets, or combination wrenches. The metric thread file also comes with a detachable plastic sleeve to cover the hand-held cutting edge, preventing finger scratches, ensuring your projects are completed with precision and ease. Safe and Portable Storage Box All thread repair tools are safely stored in a thick blow-molded box, capable of withstanding high-pressure without deformation, protecting the products from damage. The grooves inside the box prevent the thread repair tools from moving randomly, effectively preventing wear and tear.