1) The torque wrench begins to get hard to turn.
2) There is Oxidation on ratchet kit.
3) Regular outdoor use.
4) Use in temperature room under 45 degrees.
5) Never been calibrated.
5 Ways to Prevent Damage to your Torque Wrench
1) Always keep it in a case.
2) At the end of use, set value at 20% of its max value.
3) Store torque wrench at 55 degreesa or warmer.
3) Keep away from water.
5) Regular cleaning of torque wrench.