Product Feature: 1. Precision Dies restore threads to original condition, eliminating the need for thread cutting equipment. 2. Durable Steel Construction with corrosion-resistant and anti-wear property, solid and sturdy, no deformation. 3. Standard Die Set: 1 mm-1.25 mm-1.5 mm-1.75 mm, 2 mm-2.5 mm-3.0 mm-3.5 mm; 4mm pitch dies 4. Tighten the tool slightly on the good threads then back off over the damaged thread area to restore the threads. Function: Precision Dies Restore Threads to Original Condition, Eliminating the Need for Threadcutting Equipment Easy to Use: .