DMT PocketSharp Coarse & Fine Knife Sharpener, Simplistic & Portable Sharpening / Secure-Grip Nonslip Control Pads / Included Beaded Lanyard Chain

If you are so inclined and like the idea of everyday carry, here is a handy item that weighs 1.36 ounces. It fits any pocket and will put a nice sharp edge on the knife of your choice. I won't address the finer points of sharpening but the knife I choose to carry is kept very sharp with this “one ounce wonder”! 2.25 X 3 X .5 inches in size. Blue and gray plastic, the blue part is slip resistant. You have good control of it in use. You get a carbide side and a ceramic side. There's a hole for %2336 cord or a split ring. The items in a kit of everyday carry tools is a personal matter but here is a good place to start. There's a very good chance Walmart has what you are looking for.