The knob cooperates with 1/2 "sockets. It serves to drive the sockets, and at the same time allows operation on the cap and screw with higher torque than in the traditional ratchet.More torque is obtained thanks to the long arm of the knob (the moment increases in proportion to the length of the arm). made of CrV 50BV30 chrome-vanadium steel Crunch resistant burrs. The tilting oxidised spindle has a blocking and fixing cap during operation.

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