No! You do not need to purchase a new toolbox as long as the one that comes with the mechanic sets work well. However, most people invest in an additional case. If you are planning to carry the tools around, then invest in an additional toolbox. It is better to find a unique and high-quality storage case to store these mechanical tools. While the tool case you get from the manufacturer can help you keep all the tools organized, it isn’t always made of high-quality material. Remember that tool case makes it easier for you to organize everything properly. It helps you keep different sizes of tools in place.