Sean over at MAKE shares his super rad project for creating an (almost) bullet-proof binder. His is made from an old street sign, which is great for style points, but any sheet metal will work.
OK, so it’s not, actually. Bulletproof, that is. But with 3/32″ aluminum sheet covers, nickel-plated steel piano hinges, and all-riveted construction, it’s a damn sight tougher than just about any other 3-ring binder you’re likely to encounter in the wild. Especially those crappy cardboard-shrinkwrapped-in-vinyl models most of us had/have to make do with in school.
See his full how-to over on Make: Projects.