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CRKT designer Tom Stokes created the compact MicroTool and Sharpener Keychain so it would be easy to have along, and keep your favorite blade sharp, and to give you a convenient alternative to using you EDC knife to open packages, pry paint or bottle cans open, or unsafely use it as a screwdriver. It has triangular carbide inserts for sharpening, and they can be rotated to get to a fresh edge. This tool is recommended for sharpening 40° included edges, and not recommended for chisel edges or those of less than 40-degrees. In addition to the primary sharpening function, the MicroTool and Sharper features a hooked web/seatbelt cutter, a flat head screwdriver, a bottle opener, and a split ring for your keys. Because the web cutter is sharp, CRKT includes a nylon sheath to help prevent cutting yourself as you use the other tools or while digging in your pockets.