When I drove over the road in the 70's, any weapon was not allowed in the cab of the tractor. We all carried tire Billy's. Stick of wood with a lead head on it to "hit the tire to see if it had air in it".
Valid test for the tire, but it also offered a weapon that was allowed. 2013, weapons are not allowed in DOT interstate commerce.
I had a crowbar. I had to pull the nails out of the blocking with something right?