A pre-calibrated 3/8\" square drive torque range with a 2-24Nm range The Sealey STW1012 torque wrench has a Chrome Vanadium steel ratchet head with a smooth action mechanism and has scales graduated in both Nm and lb.in/lb.ft. This model comes calibrated with a calibration certificate and storage case to keep it safe when not in use. Features: Chrome Vanadium steel ratchet head with smooth action mechanism Calibration tolerance in accordance with BS EN ISO 6789 Scales graduated in both Nm and lb.in/lb.ft Comes With: Calibration certificate Storage case Specification: Drive: 3/8\"Sq Length: 275mm Range: 2-24Nm (1.47-17.70lb.ft)