You know it's important to keep your knifes sharpened, but it's not something you think about until you desperately need it. With the CRKT Knife Maintenance Tool, you can be always be prepared. Small enough to fit on a keychain, it has a ceramic honing edge and a compact tungsten carbide sharpener that are compatible with nearly every folding knife in existence. Designed by mechanical engineer, Tom Stokes, this tool is also equipped with two folding TORX tools, a covert flathead screwdriver, and a bottle opener.