In comparison to traditional multitools, keychain tools are smaller and oftentimes designed to make it through airline security. These are the best keychain tools we tried and recommend for a quick fix in a pinch. The Best Keychain ToolsBest Overall:Best Value:Best for Camping :: Best Wallet Tool:Best Key Ring Fit:What to ConsiderSize and WeightAbove all else, keychain tools must be portable and lightweight, ideally no more than 2.5 ounces. Similarly, keychain tools should be small enough to fit comfortably in your pocket without sticking out or stabbing your leg. Some keychain tools come with specialized tools such as wire strippers, wrenches, nail files, small knives, and even eating utensils.