I feel that a Gerber Multitool or some form of multitool is essential for survival. You never know when you are going to need tools, but having one solid multitool could save you from a ton of sticky situations. The only downside to the tool is that it can be easily lost if put into a not-so-safe part of your pack. So long as your mutitool is taken care of, it is a tool that will last you a long time. Personally, I have used my Gerber Multitool for all sorts of different situations. This tool can come into good use for something as simple as needing to open a can of food. Do you use any sort of multitool?