I inherited a full set of Williams sockets, made in the mid-1940s before they changed their name to Blue Point and then later to Snap On. Some of them are worn out now but it is the finest set of sockets I've ever encountered. The Americans have a history of making excellent tools - I think most of my measuring tools are still old Moore & Wright ones. As late as the 1970s, Sears' mainstream Craftsman brand tools were a bit better than Sidchrome ones, back in those days when Sidchrome made good stuff. However, now Craftsman tools are rather ordinary, they've pretty much descended to the level of Sears' cheap brand (Companion). I have had almost nothing to do with Snap On tools since they adopted that branding, and have no opinion on whether they are as good as Stahlwille. It may depend on the particular tool.
If you were going to carry a full set of Snap On tools around in a truck, you'd need more than good locks on the toolbox, you'd need good locks on the truck. The tools would be worth way more than the truck was, and if word got out, both would disappear pretty quickly.
