I just have a 19" generic tool box that I use from Walmart. It is big enough for hitches, hitch pins and a few tools. I use a ratchet strap to hold it in place with one of the tie downs in the bed. It is easy to remove if I need to haul something and/or use the back seats. Something larger would be nice but they do tend to become crap catchers... the built in storage for these things is severely lacking, especially if you loose the storage compartment under the driver's seat, i.e. heater.