At one point in my life I would have said these items were a bit of overkill, no pun intended; and that a pistol and perhaps a spare mag depending on the locale and possible scenarios would be more than sufficient to handle any untoward event. However, given the state of the world, the inane political situation, hordes of criminal illegal aliens in most areas, such an item is more than reasonable to carry about and keep in vehicle. Now to develop one for myself given the suggestions noted here.