If you need a modular tool box solution but aren't into the Milwaukee Packout, there are now a ton of different options from ...

as this rolling toolbox can hold a workshop's worth of tools and materials. The box, set on a pair of seven-inch wheels, is made up of three tiers including a removable compartment that comes with ...

I loaded them up with tools and accessories, stacked them ... With the small and large boxes mounted on the mobile storage box (with wheels), I could easily tip and roll the three stacked boxes.