CRKT 9704 Maintenance Tool 2.70" Tungsten Carbide Sharpener GRN Black Handle Black The Knife Maintenance Tool is equipped with two sharpeners and two sizes of TORX. 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. Two folding TORX tools (T8 and T6) for loose pivot nuts, pocket clip screws and back spacer screws. A covert flathead screwdriver and a bottle opener come in handy when prying open food containers and cracking open a cold one.