Survival tools come in all shapes and sizes, and while some may evoke a fun design these are still meant to be a serious item that you hope you may need to use. Whatever the motif, you can also be sure they're built to stand up to some use, and will quickly become your most essential tool. Most of these are designed to clip quickly and release just as easily from a belt loop, purse strap or keychain. In addition to being a lifesaving device, many will have some sort of bottle opener, a cutting edge, and possibly a blunt edge that can be used to tighten a screw in a pinch. You'll quickly find a million uses for these tools, and you'll always want it on hand in case of emergency.