Every Cool Tools reader likely has his/her own favorite multitool. I happen to carry a Leatherman Charge TTI, and I have noticed that I tend to use the accessory bits by themselves almost as much as my Leatherman itself. Even if you rock another brand of tool or knife daily, you might want to think about grabbing this set of bits.
Though they have been ground flat to fit the Leatherman, these bits work in any standard 1/4″ hex driver. I carry this set in the business card pouch of my work bag and typically use them with a pen-sized screwdriver I got at a trade show. This allows me to use my multitool pliers on a nut while tightening down the screw. In tight spaces, it is actually possible to use these bits without a handle – the flat grind allows you to grip them firmly.
The set packs into much less space than 40 standard hex bits, and it includes enough to tackle most common repairs. The usual sizes of screwdrivers, Torx, square, and hex bits are all there. It even includes a double sided jewelers driver. The two cases store everything firmly, and they slip easily into a pocket. I’m on my original set after 3+ years of use, and besides some shiny wear spots they’re all as good as new. For $15 the bits themselves are a cool tool with or without the Leatherman.