I usually only keep cheap stuff like ratchet straps and a small gas can in my tool box because my dad lost the keys to it. In my extended cab I always carry a battery impact gun with a cheap deep impact socket set, a multi-bit screwdriver, and a scissor jack with the 19mm hex head on it so that I can use the impact gun to operate it. I also usually carry my tools for work with me at all times which consists of several screwdrivers, wire strippers, needle nose pliers, portable soldering iron, a computer keyboard, and several other little items. So i'm guessing that if I blow out a tire and it whips around and takes out my taillight wires then i'd be fully repaired in no time.