Ever since I put my tonneau cover on, I find my stuff storing more stuff in the back of my truck. For example, my hitch, ratchet straps, and other spare tools. To keep from having this bouncing around my truck bed I found a great swing case.
The swing case is on Amazon for $199, little more expensive, but very durable and you have the ability to lock it.
Highly recommend it if you do not have a tonneau cover.