I have my tool box mounted to my utilitrac rails in my bed. I took a piece of metal strap from home depot, had a friend weld some bolts to it, and drilled holes in the bottom of the box to match up to the bolts. There you go, nice and easy. I would like a smaller box when baseball season is over( right now I have the teams gear stored in my box), so I may be looking for a smaller box soon...