Heat treated steel ratchet head. Fully hardened and tempered. Chrome plated for corrosion resistance. Calibration tolerance in accordance with BS EN ISO 6789-1:2017. Every wrench is tested and supplied with an individually numbered test certificate. Micrometer type torque range adjustment with scale graduated in both Nm and lb.ft. Flip reverse ratchet mechanism. Supplied in storage case. Features & Benefits:Heat treated steel ratchet head.Fully hardened and tempered.Chrome plated for corrosion resistance.Calibration tolerance in accordance with BS EN ISO 6789-1:2017.Range: 68-407Nm(50-300lb.ft).Every wrench is tested and supplied with an individually numbered test certificate.Micrometer type torque range adjustment with scale graduated in both lb.ft and Nm.Flip reverse ratchet mechanism.Supplied in storage case.Lifetime guarantee*.Model No. AK628 Specifications: Model No AK628 Brand: Premier Drive: 3/4"Sq Length: 660mm Nett Weight: 3.87kg Range: 68-40