A tool that provides just one function can be great, but most of the time you want to be carrying that multi-functional tool that does it all. In “Bells & Whistles”, Knives Illustrated highlights four multi-function must-haves including Gerber’s Bear Grylls Card Tool. KI calls the Card Tool “a survival kit that fits inside your wallet.” It features a 1.5-inch fixed blade, two screwdrivers, ferro rod, LED light, rulers and bottle opener and best of all slides right into your wallet. The Gerber Card Tool is an ideal tool for minor everyday crises.