UNIOR: Product featuresreversible ratchet headTorque appllication: one-way, but always apply in direction specified on torque wrench handleratchet operates in clockwise and anti-clockwise directionsfor tightening on right hand threaded bolts and nutsunmistakable signal when set torque is reachedDefault value for the recalibration interval is 12 month of use, or approximately 5.000 cycles!made according to standard ISO 6789dual scaled, Nm and KgmImportant!Do not use torque wrench for untightening!Torque tightens only in the direction showed on the key sticker! Sticker shows the proper direction of tightening!The default calibration interval of the torque wrench is 12 months or 5.000 measurements from the date of end user purchase.ALWAYS set the measuring mechanism to starting point, at the end of work.When the requested torque is reached, please do not tight any more.Torque wrench can be damaged, if manual instructions are not considered.StandardsISO 6789