General description The Sealey STW903 is a 3/8" Square Drive Micrometer Style Torque Wrench, designed for both trade professionals and DIY users. It features a flip reverse Chrome Vanadium steel ratchet head with a smooth action mechanism and a scale graduated in Nm. This calibrated torque wrench is ideal for daily professional use and is individually tested to ensure ±4% accuracy, with each wrench issued with a numbered test certificate. Technical specifications Drive: 3/8" Sq Drive Length: 420mm Nett Weight: 0.947kg Range: 20-120Nm Other information Calibration tolerance in accordance with BS EN ISO 6789-1:2017 Aluminium knurled handle for comfort and control Supplied in EVA tray Lifetime guarantee* Supplied with 1 x Torque Wrench and 1 x EVA Tray