- One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. - Range: 70-420Nm(52-310lb.ft). - Chrome Vanadium steel ratchet head with smooth action mechanism. - Calibration tolerance in accordance with BS EN ISO 6789-1:2017. - Scales graduated in both Nm and lb.in/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. - Lifetime guarantee*.