>Anyone know much about pickup truck boxes and chests? These look ok, but how do they attach? Do they attach? Any recommendations on brands? Trying to keep it around $300 and would consider used ones, though I haven't seen many of those. This will be used mostly to keep our golf clubs in.
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>http://www.truckboxdirect.com/DeltaAluminumPortableUtilityChests.aspx

From what I've heard, Delta is a good brand, and you want to get an aluminum box. That looks like a good one.