First of all, it is necessary to understand why impact wrenches are so important. It is a tool that is used for fastening activities. In other words, it is used to unfasten and fasten lug nuts, bolts, fasteners, etc. A perfect example of usage of such tools may be a tire changing. To change a tire you need to unfasten lug nuts.
Such tools are used by auto mechanics. An impact wrench is used to unfasten and fasten lug nuts. Such nuts hold the wheel. Usually, you need to five nuts are used. However, fastening and unfastening may be quite challenging and that is why an impact wrench is needed. For example, a lug nut may be frozen. In this case, it may be extremely difficult to unfasten it.
Therefore, you need to heat it and after that, you unfasten a nut. Another important factor to mention is that all nuts should be fastened with the right amount of torque. Some manufacturers of automobiles provide a chart where torque values are mentioned.