A first responder for field repairs on all types of knife blades. It's like having an entire sharpening kit right in your pocket, designed to tackle regular or serrated blades, gut hooks, hunting, and fishing blades. Just three or four strokes will restore your blade. Tungsten Carbide Knife Sharpener. Ceramic Sharpening Rods. Serrated Knife Sharpener. Diamond Tapered Rod