Stackable toolboxes are handy when you've got multiple cases to store or transport, but they can make it tricky to access the specific tool you need.

Like the Packout Tool Box Tray Attachment, the Milwaukee Packout Tool Box Caddy Attachment gives you extra storage space and easy accessibility to more items on the outside of your stack.

The first Packout item on this list expands your toolbox. The Milwaukee Packout Tool Box Caddy Attachment will run you roughly $35 from places like Home Depot and Acme Tools. It connects directly ...

The Tool Caddy attaches to a tire ... and is sized to fit inside of a 36-in. Minimizer Tool Box ...

And to top it off, the flatbed Tool Caddy fits inside of a 36-inch Minimizer Tool Box.” The Trailer Slick Plate is a self-lubricating polymer plate that attaches to a trailer’s upper coupler.