I'm looking for suggestions on a good tool box for my Ram. I'd prefer one that was flush with the bed rail, or even a little below. Also, this is probably a stupid question, but since I don't have a tool box and there isn't one around for me to look at, what secures the box to the bed of the truck?

Thanks

 

The over the rail boxes I have seen bolt down into the rail in four places. You can see the bolts when you open the box.

 

I prefer to use "J-bolts". They hook under the bed rails and then go up through the box and bolt in. So there is no need to drill holes.
As for how to mount a flush or recessed box, i have no idea short of drilling holes in the bed?

In this pic you can sort of see one of the J-bolts on the left side.



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