Multitools are ounce for ounce the most useful...

EDC is Everyday Carry: Multitools are ounce for ounce the most useful thing you can carry, albeit at somewhat of a compromise. They may never be the best tool for the job, but they’re rarely the wrong one. Recently, the multitool market, once justifiably dominated by Leatherman and Swiss Army Knife tools, has seen much greater diversity with the rise in popularity of one-piece multitools—ultra-compact pieces of metal designed to hang on your keychain with a number of functionalities.