Flip reverse Chrome Vanadium steel ratchet head with a smooth action mechanism. Scale graduated in Nm and lb.ft. Calibration tolerance in accordance with BS EN ISO 6789-1:2017. Wrenches are individually tested to standards with ±4% accuracy and each wrench is issued with an individually numbered test certificate. Aluminium knurled handle for comfort and control. Supplied in an EVA foam storage tray. Features & Benefits:Range 1/4"Sq Drive 5-25Nm, 3/8"Sq Drive 20-120Nm and 1/2"Sq Drive 40-220Nm.Flip reverse Chrome Vanadium steel ratchet head with smooth action mechanism.Calibration tolerance in accordance with BS EN ISO 6789-1:2017.Wrenches are individually tested to standards with ±4% accuracy and each wrench is issued with an individually numbered test certificate.Aluminium knurled handle for comfort and control.Supplied in an EVA foam storage tray.Lifetime guarantee*.Model No. STW900SETB