WARNING! Never use the torque wrench to undo bolts, nuts or fasteners, as this will damage the ratchet and the calibrated setting.If the torque fails to function correctly for any of the following reasons, return the torque wrench to your local Draper Tools stockist. A repair service is available.1.Ratchet fails to function. 2.Handle lock fails to function.3.Handle lock nut comes loose.4.No audible click.5.Handle does not break at set torque.6.Out of calibration. 7. Always refer tO manufacturer's literature, workshop manual or Haynes manual for recommended TORQUE SETTINGS and if applicable the sequence for tightening and final torquing of fasteners. IMPORTANT:The torque wrenches detailed in this instruction leaflet are for right hand torquing only. They are not designed for left hand thread use.This torque wrench is designed for general purpose use. If critical torque measurement is required, it is recommended the torque wrench is independently calibrated before flrst use and that the user puts in place a re-calibration schedule appropriate for the application. Draper Too1s offer a full range of precision torque wrenches for this type of application, contact your stockist for further details.