Manufactured from hardened and tempered Chrome Vanadium steel with a polished satin finish.Smooth action ratchet head with flip reverse.Easy to use torque adjustment, locks when required setting is selected.Calibration tolerance in accordance with BS EN ISO 6789:2003.Scales graduated in both Nm and lb.ft.Wrenches are individually tested to standards with 4% accuracy and each wrench is issued with an individually numbered test certificate.Supplied in storage case.