Ratchet Wrench, as known as "ratchet spanner" is a great tool used as hand tools in automobile, scaffolding, construction, machinery. While ratchet wrench requires a lot about its torque performance, if the torque is not high enough, it will not only break during using, but also do damage to the application parts.

In order to gain high torque, you need to choose high quality steel for its body, the most reasonable choice is Cr-V(Chrome Vanadium), added with proper heated process and high quality accessories, ratchet wrench max torque can be easily reached at 800NM even more, the DIN standard is 360NM, and ANS 400NM.

If you are a car mechanic or just know how to fix a car, then you can see the review on torquewrenchguide . For me, the main thing in a torque wrench is a good handle. So that my hands were not in calluses, I ordered several keys based on this review from one seller.