The draper eptw120 400 precision torque wrench has been constructed with a reversible ratchet head and locking preset action the torque values are viewed via a window in the handle draper39s eptw120 400 benefits from a range of 120 400nm accuracy plusmn4 there is a full instruction manual and calibration certificate included with each torque wrench and this wrench is supplied in blow mould casemanufactured and calibrated to iso6789 1992 12 01 standard