I bought these boxes because they looked like a better way to store loose fasteners—and they are. Stored nails and drywall screws take up less space than the jars and cans on the shelves in my shop, and I have better access because the clear lids let me see what's inside.

The Deep Pro Organizer comes with 10 removable cups: eight small ones about 3 inches by 4 inches by 3 1/2 inches deep; and two large ones twice that size. You can swap cups between boxes, and ridges on the underside of the lid prevent cups from sliding around when neighboring ones are missing. The boxes can be carried alone or ganged together with clips that fold up from the sides.

As plastic boxes go, the Deep Pro is very sturdy. The latches and hinge pin are steel and the lid is polycarbonate; everything else is thermoplastic.

Unlike most inexpensive organizers, these boxes do a good job of keeping parts from sliding into neighboring cups when you stand them on edge.

The Mid-Size Pro Organizer holds six of the same small removable cups, has two smaller cups molded into the handle, and can be connected to other boxes of its kind. Unlike the Deep Pro, this box has polycarbonate latches molded into the lid. They make the lid easier to open and close, but I can't speak for how long they will last. The other notable difference is the presence of a gasket near the edge of the lid, which gives this box an IP53 rating—just shy of being dust-proof, and moderately water resistant (resistant to water sprayed 60° off vertical).

Both of these Pro Organizers are sturdy and convenient. They can't be ganged with toolboxes like L-Boxxes and Systainers can, but they are equally handy and sell for a fraction of the price of those systems.

David Frane is editor ofTools of the Trade, from which this review has been adapted.