Using the Makita 197210 - 9 interlocking case is super easy. First, open the lid by releasing the interlocking latches. Then, place your power tools inside. You can stack multiple cases on top of each other, aligning the channels on the lid and base for a stable stack. The low - profile handle makes it comfortable to carry, and the recessed side handles are handy for lifting. When transporting, make sure the latches are firmly closed to keep the lid shut. As for maintenance, keep the case clean by wiping it with a dry cloth. Avoid using harsh chemicals that might damage the case. Check the latches regularly to ensure they are working properly. Also, if you're using it with other compatible systems, make sure they are correctly connected.