Unlike another Asia making Tube Wrench, Tien-i Super Durable Tube Box Wrench is designed by pro and made for pro.
Tien-i Tube and Box wrench can surpass German standard torque requirement (DIN/ISO 1711-2) by 2 -3 times.
Why is Tien-i Tube Box Wrench more tough and durable !?
The secret is about the quality Cr-V alloy steel material from Taiwan plus high-tech heat-treatment for precise hardness range. Plus all the spec meet the DIN/ISO requirement.
If you search for the tool maker who is made for pro. Try Tien-i Super Durable Tube Box Wrench.
