There is no specific size of tool sets that is perfect for all mechanics and drivers. It is best to start low. Buy only the required number of tools at the beginning. You always have the option to expand your mechanic toolkit in the future. The quality of the tools is as important as the number of these mechanical tools. Pay special attention to the material’s quality. The last thing you want is to end up getting plastic or rubber tools that don’t deliver the best performance. Of course, the more tools you have in the case, the better the performance they will deliver.