The 72-tooth inner ring of special high alloy steel ratcheting even when one lever movement of 5 °. Nevertheless, the torque transmission capacity far exceeds the DIN / ISO. Stems from CrV steel with optimum surface protection: 2x nickel-plated and 1x plated. Clearly legible wrench sizes through laser marking process!
The very pleasant for working in practice, self-locking of the joint is unabated available even after more than 10,000 operations. The flexibility to none when it gets tight and tricky.