Feature: 1. Patented product. 2. Energy-saving tool designed for tire change. 3. Small size, light weight, easy to carry & storage. 4. Input square: 1/2" 5. Output square: 1/2" 6. 3.4:1 torque multiplication. 7. Max. rated output: 600Nm (443Ft-lb) 8. Accuracy tolerance: ±5%. 9. The tool is adapted for tire change of car and van in automotive repair industry. 10. Supplied with the rubber-cover reaction bar for tire rim protection purpose. Details: 1. Input Square(F): The material is CR-V alloy steel. 2. Output Square(M): The material is CR-V alloy steel brings better stability and reliability. 3. 4. Handle: The movable reaction handle is suit for different working place.