Manufactured from Chrome Vanadium steel. Hardened & tempered with a chrome plated polished finish. Ratchet head features flip reverse action & push-through drive to allow torquing either clockwise or anti-clockwise. Comfort grip with easy to use torque adjustment locks when required setting is selected. Calibration tolerance in accordance with BS EN ISO 6789: 2003. Suitable for commercial & industrial applications. Scales graduated in both lb.ft & Nm. Individually tested for ±4% accuracy & issued with an individually numbered calibration certificate. Supplied in storage case with padlock.