The Sealey STW906 Torque Wrench with an aluminium knurled handle for comfort and control The Sealey STW906 is a flip reverse Chrome Vanadium steel ratchet head with a smooth action mechanism. The calibration tolerance is in accordance with BS EN ISO 6789-1:2017. The STW906 wrenches are individually tested to standards with ±4% accuracy and each wrench is issued with an individually numbered test certificate. Fitted with an aluminium knurled handle for comfort and control. Supplied in storage case. Features:    Scale graduated in Nm Supplied in storage case Aluminium knurled handle for comfort and control Calibration tolerance in accordance with BS EN ISO 6789-1:2017 Flip reverse Chrome Vanadium steel ratchet head with smooth action mechanism One of a comprehensive range of Premier Hand Tools, suitable for daily professional use Wrenches are individually tested to standards with ±4% accuracy and each wrench is issued with an individually numbered test certificate Specification: Range: 100-600Nm Model No: STW906