First, when using an electric wrench, the force must be gentle and even. You must never pull with a short, impulsive force, because if you pull it sharply, it will generate an impulse, and at the moment when the force is stopped, the screw or bolt will be overturned. So the force must be even. And I believe that consumers who have used electric wrenches know that contamination can also prevent accurate torque values. If there is contamination on the parts of the electric wrench or on the screw holes, then it is impossible to have the correct torque value. Therefore, everyone should pay attention to this problem in the daily use process.

Second, in the process of use, friction is a common phenomenon, but it also has both good and bad aspects. The good thing is that it keeps the parts together, and the bad thing is that it can give wrong results when tightening, so I recommend that you also take friction into account during use. And if you tighten the nut or bolt with damage or obstacles on the thread, you must also pay attention to how much additional torque is required to pass the damaged part, and then add this additional torque to the recommended torque value.