For most of us it’s hard to imagine life without the multi-tool. These days virtually everyone offers some variation on the basic theme of Tim Leatherman’s original design. The multi-tool is as common as the pocketknife, and perhaps even more so. But if you’re interested in the evolution of the design that revolutionized portable readiness (and ended the primacy of the Swiss army knife as the ultimate do-all), then click here or on the photo to check out this cool slideshow at Popular Mechanics that charts how the Leatherman evolved from idea to prototype to reality.