Chrome Vanadium steel ratchet head with flip reverse action and push-through drive to allow torquing in both directions. Large composite handle grips with unique mechanism which locks adjustment in place once torque figure is selected. Calibration tolerance in accordance with BS EN ISO 6789:2003. Scales graduated in both Nm and lb.ft. Wrenches are individually tested for ±4% accuracy and each wrench is issued with an individually numbered test certificate. Supplied in storage case.