The Draper EPTW120-400 Precision Torque Wrench has been constructed with a reversible ratchet head & locking preset action. The Torque values are viewed via a window in the handle. Drapers EPTW120-400 benefits from a range of 120-400 Nm, accuracy ±4%. There is a full instruction manual & calibration certificate included with each torque wrench & this wrench is supplied in blow mould case. Manufactured & calibrated to ISO6789-1992-12-01 Standard