The Sealey AK624 Micrometer Torque Wrench is chrome plated for corrosion resistance  The Sealey AK624 is a Torque Wrench with micrometer type torque range adjustment with a scale graduated in both lb.ft and Nm. Flip reverse ratchet mechanism. Supplied in storage case. Every wrench is tested and supplied with an individually numbered test certificate. Features:   Fully hardened and tempered  Heat treated steel ratchet head  Chrome plated for corrosion resistance  Calibration tolerance in accordance with BS EN ISO 6789:2003   Comes With:   Storage case  Calibration certificate  Specification:  Length: 465mm  Drive: 1/2 Inch square drive  Range: 27.1-203.5Nm(20-150lb.ft)