Product Descriptions Metric die set: Three dies included: 1 mm-1.25 mm-1.5 mm-1.75 mm; 2 mm-2.5 mm-3.0 mm-3.5 mm; 4 mm pitch dies Material: Manufactured with high-quality steel, good resistance and durability in use, showing stable performance with economical price. Design: The sawtooth shape helps to increase the friction obviously during repairing and removes the rust on the threads efficiently. Convenient: Installed appropriately in the holder of thread chaser and the bolt put in right position, simply rotating to get damaged or rusty threads repaired. Descriptions: .