50 Pcs Heavy Duty Slotted Carbon Steel Thread Repair Kit For M3 To 12 Millimeter Bolt Tapping Tool With Strong Vibration Resistance And Durable Self Tapping Screws For Quick Fix And Engine Maintenance Jobs

50 Pcs Slotted Thread Repair Kit For M3 12mm Self Tapping
✔️ Carbon Steel 50 Pcs M3 To 12mm Inserts Self Tapping Kit

Fix stripped threads and restore damaged holes fast with this set. Used for automotive engines and construction tools.

✅ 50 pieces of heavy duty slotted inserts included for complete sets
✅ M3 to 12mm sizing covers most common bolt repair applications
✅ Resists vibration ensuring secure locks in heavy machinery

💡 Why do carbon steel self-tapping threads outlast standard bolts?
- They rebuild thread diameter so screws tighten tightly
- Material handles stress without deforming under pressure
- Installation creates new internal thread shape for life