Columbia River Knife & Tool Knife Maintenance Tool, 2.70, Tungsten Carbide Field Sharpener, Glass Reinforced Nylon Handle, Ceramic Honing Edge, T6 and T8 Torx, Black 9704 If there's anyone that has a completely unique view of preparedness" it's designer Tom Stokes. As a mechanical engineer" he's well equipped to rethink and imagine tools that become critical to a survivalist pack. The Knife Maintenance Tool-equipped with two sharpeners and two sizes of TORX-is one of those tools.